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To address industry pain points of traditional manual shell-making in investment casting, including low efficiency, inconsistent product quality and high defect rates of large complex castings, Weifang Junlong Machinery has recently fully completed the technical upgrading of its fully automatic intelligent shell-making production line. Equipped with robotic automatic dipping-coating equipment and a constant temperature & humidity intelligent drying system, the company realizes digital control of core investment casting procedures and comprehensively boosts mass production capacity for high-end castings. Traditional manual shell-making is plagued by uneven coating thickness, uncontrollable drying cycles and easy cracking of large wax assemblies. Especially for thick-walled special-shaped castings used in petroleum and construction machinery, defects such as pores and shrinkage porosity frequently occur. This time, Junlong introduced automatic circulating shell-making equipment paired with an intelligent workshop environmental control system, which precisely regulates temperature, humidity and wind speed in the shell-making workshop. Data of dipping-coating, sanding and drying for every set of wax patterns are recorded throughout the whole process, enabling traceable process parameters and cutting casting reject rates from the source. Three remarkable core achievements have been delivered after the technical renovation: Improved Production Efficiency: The daily output of a single shell-making line rises by 25%. Multiple batches and specifications of wax patterns can be produced simultaneously, shortening order delivery cycles. Upgraded Quality Consistency: The surface finish and dimensional uniformity of castings are greatly optimized, and the first-pass yield rate of complex structural castings has reached 98.8%. Optimized Labor Allocation: Repetitive high-intensity manual stations are reduced, human-induced operational errors are minimized, and production standardization is greatly enhanced. According to the technical director, Junlong has also upgraded heat treatment and non-destructive testing equipment. The quenching and normalizing processes are optimized for high-strength alloy steel castings such as 42CrMo and 713C, stably meeting heavy-load and impact-resistant working conditions of construction and petroleum machinery. With pre-analysis via CAD/CAE simulation, potential casting defects can be predicted in advance, drastically shortening the verification cycle of new product mold development. As a large-scale local investment casting exporter based in Weifang, Junlong takes technological innovation as its core competitiveness. Three production systems are deployed in parallel: silica sol medium-temperature wax investment casting, water glass composite process and resin sand casting, covering production demands ranging from small precision parts to medium & large heavy-duty castings. In the next step, the enterprise will continuously promote digital workshop transformation and build a production data management system, leveraging intelligent manufacturing to support the global business expansion of high-end mechanical component supply.

Recently, Weifang Junlong Machinery has upgraded its silica sol investment casting process. Technological improvements have been made in cluster reinforcement, multi-layer dipping and air-drying control, which effectively reduces deformation and sand inclusion defects in thin-walled castings and steadily raises the overall product qualification rate. In investment casting, wax pattern clustering and shell fabrication are the key processes that determine casting quality. The technical team has adjusted the welding structure of wax patterns and installed internal iron bar reinforcements. By controlling temperature and humidity in different stages, we have solved the common industry problem of deformation in complex castings such as oilfield cable protectors and impellers. Meanwhile, we have strengthened raw material incoming inspection and conducted rapid pre-furnace composition testing for alloy steel and stainless steel molten metal to guarantee the tensile strength and wear resistance of castings from the source. The factory now operates both high-end silica sol production lines and sodium silicate lines. We are capable of manufacturing high-precision export castings and general construction machinery castings. We can meet the near-net-shape requirements of high-end overseas buyers, while accepting bulk orders for mining equipment, forklift parts and petroleum machinery castings from domestic customers. With mature heat treatment technologies including normalizing and quenching, we can provide one-stop services covering casting and precision machining. Going forward, the company will promote eco-friendly and low-carbon production, optimize energy consumption, and gradually expand the production capacity of alloy steel precision castings. We will keep exploring the high-end construction machinery supporting markets across Europe and America.

Recently, Weifang Junlong Machinery has ushered in a peak period for bulk delivery of overseas orders, covering forklift castings, petroleum machinery parts and stainless steel precision castings. All production lines are fully scheduled. Workers in the investment casting workshop and machining teams stick to their posts. Shifts are reasonably arranged. Strict control is implemented throughout the whole process including wax pattern making, tree assembly, shell making, melting, pouring and heat treatment in line with the silica sol investment casting standards to stabilize dimensional tolerance and metallographic structure, steadily raising the first-pass yield of export castings. Engineers from the Technical Department stay on-site to optimize process parameters for difficult-to-cast workpieces made of 25CrMo alloy steel and 316L stainless steel, effectively tackling common defects such as blowholes and cracks in thin-wall castings. The quality inspection team strengthens first-piece inspection and in-process patrol inspection. In accordance with ISO quality management system requirements, every piece is tested and every batch is fully documented. All departments work closely together. The warehouse prepares raw materials in advance, while the sales team keeps close contact with overseas shipping schedules. All staff are united to guarantee quality, quantity and lead time. The company strives to fulfill quarterly export shipments and further consolidate long-term cooperation with clients in Europe and America.

Supported by full-range product capabilities enabled by dual casting processes, the company’s products are now exported to more than 20 countries across Europe and America, covering four major sectors: construction machinery, energy equipment, shipbuilding and rail transit. In Q2 this year, multiple batches of investment-cast precision forklift structural parts and sand-cast heavy counterweights were shipped to Germany, the United States and Sweden. Overseas clients reported that accurate process matching has cut overall machining costs by an average of 22% while greatly improving the interchangeability of components, leading to a continuous rise in repeat orders. The company’s foreign trade director stated that global manufacturing industries are now prioritizing cost reduction and efficiency improvement. Simply competing on raw casting prices can no longer satisfy clients’ long-term demands. The differentiated service model integrating investment casting and sand casting delivers one-stop supply solutions ranging from large rough castings to small precision components, eliminating the extra costs incurred by coordinating multiple suppliers. Going forward, the enterprise will further optimize eco-friendly casting techniques, upgrade waste heat recovery and energy-efficient melting equipment, and launch an online consultation service for process selection. Free technical support including part process evaluation and cost estimation will be provided to global purchasers. Industry experts noted that China’s precision casting sector is rapidly shifting toward classified process application and customized production in 2026, with single-process production models gradually phased out. Manufacturers proficient in both sand casting and investment casting that can produce full-size castings will gain a prominent edge in global supply chain competition. This shift will accelerate the transformation of China’s casting industry, moving from exporting low-end rough castings to supplying high-value-added precision components.

Held from May 6 to 9, 2026 at the National Exhibition and Convention Center (Shanghai), China’s largest foundry exhibition gathered more than 130 enterprises covering the whole industrial chain of investment casting, including silica sol investment casting, 3D printed wax patterns, intelligent shell making and high-temperature alloy melting. Core Trends The whole industry is shifting to high-end downstream sectors such as aerospace, medical devices, ocean engineering and new energy equipment, while the production share of traditional castings for forklifts and general hardware keeps shrinking. Exhibition Highlights Monocrystalline superalloy turbine blades, thin-walled titanium alloy casings, duplex stainless steel chemical valves and integrated 3D printed wax pattern assemblies were on display in batches. Clustered manufacturers from Shandong, Hebei, Jiangsu and Zhejiang attended the show, with automatic intelligent pouring lines and full-automatic constant-temperature shell production lines becoming mainstream upgrades for equipment suppliers. Expert Analysis Released at Expo Forum The forum delivered a key judgment: China’s investment casting industry has entered an era of micron-level precision competition.   Wall thickness of aero-engine blades ranges only from 0.3 mm to 0.8 mm, with profile tolerance controlled within 50 microns. The traditional practice of reserving large machining allowances has been phased out, forcing manufacturers to widely adopt casting simulation software. More than 60% of leading enterprises use simulation tools, cutting trial production rounds from 3–5 to 1–2 and reducing rejection rates by 15%–20%.

To meet the production standards for high-end parts, solve common production pain points of traditional precision casting including unstable wax pattern forming, high porosity of castings and high energy consumption, and consolidate the company’s high-end precision manufacturing capacity foundation, the Production & Manufacturing Center, jointly with the Technology R&D Department and Quality Management Department, has recently completed the full-process process upgrading and refined equipment commissioning for precision casting. The completion of this technical renovation has realized a dual improvement in product yield and production efficiency of the section, achieving the phased technical renovation targets successfully. Centering on five core working procedures including wax pattern preparation, shell firing, vacuum smelting, pouring & cooling, and post-processing, this optimization carries out localized upgrading based on the company’s existing silica sol precision casting production line. In the early stage, combined with the recent production data of outsourced high-end parts and engineering machinery precision fittings, the technical team sorted out six major production difficulties such as forming defects of thin-walled special-shaped castings, shell cracking and inaccurate smelting temperature control. The team organized team backbones and process engineers to conduct more than 20 proportion tests and parameter debugging, optimized three key process parameters including surface coating proportion, curing time and graded firing temperature, and calibrated the temperature control system of smelting furnaces and constant temperature & humidity equipment in the shell-making workshop, making up for the inconsistency defect caused by manual operation. During the production implementation phase, all staff of the precision casting team received practical training on the new process, implemented standardized operation procedures, and set up dedicated process control posts to strictly control the precision of each procedure covering wax pattern dimension verification, shell air-drying, vacuum pouring and non-destructive testing. For small-batch high-precision non-standard castings, the technical team provided one-on-one process follow-up, adjusted pouring flow rate and cooling rhythm in a targeted manner, and greatly reduced defects such as casting shrinkage cavity, deformation and excessive surface roughness. Two weeks after the official launch of the new process, remarkable results have been achieved in production indicators: the comprehensive qualified rate of precision castings has risen from 92.3% to 98.1%, the single-piece production cycle has been shortened by 12%, the consumption of refractory materials and alloy raw materials has decreased by 8%, and workshop energy consumption has declined steadily. Meanwhile, the workshop can stably produce special-shaped precision castings with higher complexity and smaller tolerance, which meets the manufacturing requirements of supporting parts for new energy, hydraulic machinery and rail transit, and further expands the application scope of the company’s precision casting business. According to the person in charge of the Precision Casting Section, the team will further implement lean production, carry out regular process improvement activities and post skill competitions, summarize operation experience of the new process and optimize standardized operation manuals. The technical department will continue to develop ultra-low-consumption casting processes, build a high-precision, high-quality and low-cost precision casting production line via process upgrading and intelligent manufacturing. The section will help the company expand the high-end supporting parts market, consolidate core market competitiveness with sophisticated quality, and contribute to the completion of the company’s annual production targets with high-quality development.

Weifang, Shandong — Driven by mature silica sol investment casting technology, the overseas export orders of Weifang precision casting industry increased by 21.7% year-on-year in the first half of 2026. High-end stainless steel and alloy steel castings have been exported to more than 20 countries in Europe and America, serving core parts of construction machinery, oil & gas exploitation, marine shipping and new energy equipment. As a core precision casting industrial cluster in North China, Fangzi District of Weifang has built a complete industrial supply chain. Local standardized foundries fully adopt eco-friendly full silica sol casting technology, phasing out high-pollution sodium silicate production lines. The factory mass-produces 304/316 stainless steel, duplex stainless steel, high-temperature alloy and special alloy castings, with dimensional accuracy up to CT4-CT6 and surface roughness up to Ra3.2μm, meeting high-standard pressure resistance, corrosion resistance and mechanical strength requirements of overseas premium equipment. Most local enterprises have upgraded intelligent and low-carbon production lines, equipped with process simulation systems, automatic shell-making machines and vacuum induction melting furnaces. The qualified rate of finished castings rises by 10%, and the product trial cycle is shortened by 40%. Equipped with integrated waste gas recycling and sewage treatment facilities, all workshops pass EU ESG environmental assessment and CE certification, becoming qualified suppliers for top European and American equipment manufacturers. Industry analysts point out that overseas local foundry capacity is insufficient with long delivery cycles, making Chinese high-precision investment castings highly competitive in global markets. In the second half of 2026, local enterprises will focus on new energy vehicle structural parts, deep-sea marine impellers and high-end oil & gas connectors, expanding markets in Europe, North America and the Middle East, to build a national export base for high-end precision casting products.

Recently, orders for stainless steel investment castings have kept rising driven by marine equipment, chemical pumps & valves, food pharmaceutical and construction machinery industries. Many purchasers encountered premature corrosion failures caused by improper material selection only focusing on low cost. Professional technical experts from precision casting factories sorted out the core disparities between 304 and 316L austenitic stainless steel castings to provide standardized reference for material selection across the whole industrial chain. 1. Chemical Composition: Root of Performance Gaps   304 stainless steel contains around 18% chromium and 8% nickel without molybdenum, with maximum carbon content of 0.08%.316L features 16%–18.5% chromium and 10%–14% nickel, plus approximately 2% molybdenum. The letter "L" stands for low carbon, controlled under 0.03%. 2. Corrosion Resistance Creates Application Boundaries   In dry indoor atmosphere, normal fresh water and non-corrosive environments, 304 and 316L show similar anti-rust performance. Their gaps become prominent once exposed to chloride ions, weak acid or alkali media.   3. Minor Differences in Mechanical, Heat & Machining Performance   At room temperature, tensile strength, yield strength and low-temperature toughness are nearly identical for both grades, with equivalent basic pressure-bearing and structural load capacity. Slight differences exist in heat resistance: 304 can stably work up to 800°C continuously, while 316L is recommended for long-term use below 700°C. 304 boasts slightly better high-temperature oxidation resistance, yet 316L performs superiorly against chemical corrosion under heat.   4. Cost & Full Lifecycle Cost-Performance   Raw material cost of 316L is 20%–40% higher than 304 owing to expensive molybdenum and nickel. Combined with stricter melting control and higher heat treatment loss, finished precision castings of the same specification cost 20%–30% more for 316L.

Recently, a domestic precision casting manufacturer has optimized mass production solutions for three mainstream cast materials including 4140 alloy steel, Q345 carbon steel and 304 stainless steel with mature silica sol casting technology. Its products serve multiple sectors such as construction machinery, petroleum equipment and food machinery, further expanding domestic and overseas supply markets.   4140 quenched and tempered alloy steel castings feature high strength and impact resistance for forklift rocker arms and heavy-duty mining connectors. Q345 castings stand out with good toughness and cost efficiency, widely applied in trailer structural parts and agricultural machinery components. Anti-corrosion 304 stainless steel castings are used for food equipment and marine spare parts.   Equipped with full-range quality inspection procedures from raw material spectrum analysis to non-destructive testing, the factory accepts customized OEM orders. Its goods are exported to numerous European and American countries. By upgrading smelting and heat treatment processes, the firm improves casting dimensional accuracy while shortening lead time, consolidating its position in the global precision casting supply chain.

Recently, the precision casting industry has continuously optimized post-processing procedures. As a key process to improve the mechanical properties and stabilize the dimensional accuracy of castings, heat treatment has become a core link in the production of high-end castings. At present, mainstream industrial heat treatment processes have formed a standardized system, adapting to the production requirements of various precision castings made of carbon steel, alloy steel, stainless steel and other materials. According to industry technicians, there are five core heat treatment processes commonly used for precision castings. Stress relief annealing is mostly applied to high-precision thin-walled castings to eliminate internal casting stress and prevent subsequent deformation and cracking. Normalization is used for ordinary carbon steel and low-alloy steel castings to refine grains, homogenize structures and optimize the cutting performance of workpieces. As a combined process of quenching and high-temperature tempering, quenching and tempering is the preferred process for heavy-duty castings used in mining, automotive and other industries, delivering both high strength and toughness. Low-temperature quenching and tempering focuses on wear resistance, suitable for precision wear-resistant parts such as valve cores. In addition, solution treatment, exclusive for stainless steel castings, can effectively improve the corrosion resistance and structural stability of products. Industry insiders stated that accurate matching of heat treatment processes can greatly reduce the defect rate of castings and improve product consistency, enabling precision castings to meet the stringent quality standards of high-end fields such as machinery, shipbuilding and petroleum equipment.

Silica Sol Composite Precision Casting for Export Orders is typically used for stainless steel, alloy steel, heat-resistant steel, and some high-temperature alloy parts. Export customers usually focus not only on dimensions and appearance but also on traceability, process capability, compliance documentation, cooperation with third-party inspections, and the ability to provide complete evidence chains during system audits. The following summarizes the ten key inspection points for silica sol composite precision casting, covering raw materials, processes, finished products, and documentation, to help meet customer acceptance requirements and the common needs of system audits such as ISO 9001, IATF 16949, and AS9100. 1. Review and inspection of orders and drawings, shifting acceptance criteria to the front. 2. Inspection of Raw Materials and Auxiliary Materials, and Foundation for Compliance of Materials and Systems 3. Wax Pattern and Mold Making Process Inspection: Ensuring Dimensional Consistency from the Source   4. Inspection of Key Shell-Making Parameters: The Core of Surface Quality and Shell Strength   5. Dewaxing and Sintering Inspection: Critical Checkpoints for Preventing Cracked Shells and Reducing Inclusions   6. Inspection of Melting and Pouring Processes, Determining Internal Quality and Mechanical Properties 7. Cleaning, Cutting, Grinding, and Visual Inspection: Expose Defects Early   8. Dimensional and Geometric Accuracy Inspection: Use Appropriate Methods to Control Risks   9. Internal Quality and Non-Destructive Testing (NDT) Inspection: Meet Common Export Acceptance Requirements  10. Documentation, Marking, Packaging, and Outbound Inspection: Close the Loop for Customer Factory Audits and System Reviews  

In oil and gas extraction, especially for electric submersible pump (ESP) downhole operations, cables serve as the core carrier of underground power transmission, directly affecting well stability and operational safety. Many practitioners question whether oilfield cable protectors are mandatory accessories. Industrial practices and safety standards give a clear answer: for regular downhole oil and gas operations, cable protectors are not optional, but essential equipment to ensure production safety and reduce losses. Downhole oil and gas environments are harsh and complex. Sharp tubing threads, friction and extrusion during pipe running and pulling, as well as underground high‑pressure vibration, can easily damage cable jackets and strain inner conductors, causing electric leakage and short circuits. This may lead to total cable failure and high replacement costs, or burn downhole motors and surface control cabinets, resulting in well shutdowns, construction delays, severe economic losses and safety hazards. In terms of industry standards, CNPC, Sinopec and major overseas oilfields have formulated clear downhole cable protection regulations. ESP‑cable operations without qualified cable protectors fail construction inspections and are prohibited from running downhole. Cable protectors effectively shield cables from tubing impact and friction, avoid extrusion and torsion risks, extend service life significantly and reduce failure rates. Only surface cables and temporary small‑scale operations in ultra‑shallow wells are exempted. For conventional wells, long‑term production wells and ESP‑supported operations, installing cable protectors has become an industrial consensus and rigid requirement. As oil and gas extraction expands to deep and complex wells with harsher downhole conditions, high‑performance cable protectors are becoming indispensable for safe, stable and efficient oil and gas production.

Weifang Junlong Machinery Excels in High‑End Casting Manufacturing to Boost High‑Quality Development of Equipment Manufacturing Industry   Recently, relying on solid accumulation in precision casting, silica sol process and high‑end metal castings, Weifang Junlong Machinery Co., Ltd. has continuously expanded global markets. With reliable product quality and comprehensive supporting services, it has become a core supplier for forklift parts, construction machinery, marine components, pump & valve parts, auto spare parts and other sectors, steadily enhancing the international competitiveness of Chinese precision casting enterprises. As a local manufacturer with years of experience in precision casting, Junlong Machinery focuses on the R&D and production of multi‑material castings including low‑carbon steel, alloy steel, stainless steel and high‑manganese steel. Adopting advanced silica sol lost‑wax precision casting technology, combined with modern production methods such as digital simulation and intelligent quality inspection, the company strictly complies with national, European and other industrial standards. It provides customized production of various non‑standard precision castings featuring high precision, stable performance and strong adaptability. With an annual production capacity of nearly 10,000 tons, its products are widely used in forklift components, agricultural machinery, petroleum machinery, railway parts, food & chemical equipment, architectural hardware and other fields, exported to more than 20 countries across Europe and America, winning wide recognition from global customers. In production management, Junlong Machinery implements strict whole‑process quality control covering raw material procurement, smelting & casting, heat treatment, machining and delivery inspection. Committed to technological innovation and process upgrading, it continuously improves production efficiency and product performance, offering one‑stop solutions including casting design, mold opening, casting and finish machining for customers. Rooted in Weifang, serving the world. Going forward, Weifang Junlong Machinery will uphold the philosophy of craftsmanship‑oriented manufacturing, increase investment in R&D, and deepen its layout in high‑end precision casting. It will empower global equipment manufacturing industries with higher‑quality products and more professional services, facilitating the high‑quality and international development of China’s precision casting industry.

Technological innovations are revolutionizing investment casting. 3D printed wax patterns greatly shorten development cycles and ensure high precision. Combined with digital simulation and AI inspection, production efficiency is vastly improved while defect rates drop sharply. Advanced duplex stainless steel and thin-wall casting technologies also further expand product performance and application scope across multiple industries.

Silica sol composite precision casting for export orders is commonly applied to parts made of stainless steel, alloy steel, heat-resistant steel and some superalloy materials. Export customers focus not only on dimensional accuracy and appearance, but also attach greater importance to traceability, process capability, compliance documents, cooperation with third-party inspection, and the availability of complete evidence during system audits. This article summarizes ten key inspection points for silica sol composite precision casting, covering four major stages: incoming materials, production process, finished products and documentation. It helps meet the general requirements of customer acceptance as well as system audits including ISO 9001, IATF 16949 and AS9100.   1. Review and Inspection of Order & Drawing Requirements — Advance Acceptance Criteria 2. Incoming Inspection of Raw Materials & Auxiliaries — Foundation of Material and System Compliance 3. Wax Pattern & Tooling Process Inspection — Stabilize Dimensional Chain at the Source 4. Key Parameter Inspection of Shell Making — Core of Surface Quality and Shell Strength 5. Dewaxing & Sintering Inspection — Critical Barrier Against Shell Cracking and Inclusion Reduction 6. Melting & Pouring Process Inspection — Determination of Internal Quality and Mechanical Properties 7. Shakeout, Cutting, Grinding & Appearance Inspection — Expose Defects at Early Stage 8. Dimensional & Geometric Accuracy Inspection — Risk Control with Appropriate Methods 9. Internal Quality & NDT Inspection — Meet General Acceptance Clauses of Export Orders 10. Documentation, Marking, Packaging & Shipment Inspection — Closed Loop for Customer Factory Audit and System Certification The core of inspection management for export-oriented silica sol composite precision casting lies in clear standards, traceable data, controlled processes and closed-loop evidence. Embedding inspection controls into every link including incoming material receiving, wax pattern making, shell manufacturing, dewaxing & sintering, melting & pouring, cleaning, dimensional testing, NDT and shipment documentation can fully satisfy customer acceptance and system audit requirements, reduce rework and compensation claims, and enhance overall delivery reliability.

WEIFANG, China – May 12, 2026 – As the global precision casting market surges to $19.42 billion in 2026, driven by demand for high-precision components in automotive, aerospace, and construction machinery, Weifang Junlong Machinery Co., Ltd. (JCAST), a leading Chinese manufacturer, is strengthening its international presence by leveraging advanced silica sol investment casting technology and automated production lines.   Global Market Growth & China’s Leadership   The precision casting industry, also known as investment or lost-wax casting, is experiencing robust growth with a 5.01% CAGR projected through 2035. The Asia-Pacific region dominates with a 46% market share, where China accounts for 65% of regional output, fueled by its robust manufacturing sector and policy support for advanced casting technologies.   “Globally, manufacturers are shifting from traditional sand casting to precision casting to achieve tighter tolerances (under 0.01mm), superior surface finish, and reduced machining costs,” said a industry analyst. “Aerospace and automotive sectors lead demand, representing 38% and 29% of applications respectively, while construction machinery holds 16%.”

Founded in 2014 in Weifang, Shandong Province, Weifang Junlong Machinery is a key enterprise in the precision casting industry. Located in Fangzi District, Weifang City, it serves as a core supplier of precision castings in the complete forklift industrial chain. The company specializes in the R&D and production of critical forklift castings including fork tine parts, axle housings and gearboxes, and has gained wide recognition from customers at home and abroad for its high-quality products.   At present, it provides core supporting parts for many domestic forklift manufacturers, while actively expanding overseas markets. Its products are exported to more than 20 countries and regions such as the United States, Italy, Germany and France. With reliable quality and efficient delivery, the company has won wide trust in the international market, adhering to the business philosophy of Integrity, Professionalism, Efficiency and Innovation.   Talents are the fundamental driving force for the development of the casting and forging industry. Weifang Junlong has established a comprehensive talent training system, focusing on the cultivation and recruitment of technical personnel. The company currently has more than 15 professional and technical staff, forming a proficient and experienced team dedicated to R&D and production.   Relying on standardized production procedures and professional training mechanisms, the company continuously improves employees' professional competence, providing solid talent support for technological innovation.   "Products keep upgrading, yet the essence of casting remains unchanged. Cast and forged parts are the cornerstone of the equipment manufacturing industry. Without high-quality casting components, the performance and reliability of any finished product cannot be guaranteed," said a relevant person in charge of Weifang Junlong.   Going forward, the company will stay focused on its core business, making continuous breakthroughs in the high-end, intelligent and green development of forklift castings. With an annual production capacity of 9,000 tons, Weifang Junlong strives to become a precision casting enterprise with regional influence and global competitiveness, contributing its solid casting strength to Chinese manufacturing.

As oil and gas exploration moves into deeper, hotter, and more corrosive wells—especially for Electric Submersible Pump (ESP) systems—downhole cables face severe risks: mechanical abrasion, high‑temperature aging, H₂S/CO₂ corrosion, and fatigue failure from vibration. These issues cause unplanned shutdowns, costly workovers, and production losses. Today, we’re proud to highlight our high‑performance petroleum cable protectors—engineered to extend cable life, enhance operational safety, and lower total cost of ownership (TCO) for global oilfield operators.   What Is a Petroleum Cable Protector?   A petroleum (downhole) cable protector is a mechanical clamping and safeguarding device designed specifically for ESP cables, monitoring cables, and control lines in onshore/offshore wells. Unlike power‑grid overvoltage protectors, its core mission is mechanical defense, secure fastening, and centralization:   Mounted on tubing outer walls (2‑3/8” to 4” sizes) Clamps flat/round cables firmly in a grooved cavity Shields cables from direct contact with casings, tubing couplings, and wellbore walls Withstands extreme downhole conditions: 120°C–150°C heat, high pressure, brine, crude oil, and H₂S  

The current mechanical manufacturing industry is driven by six core development directions: intelligentization, digitalization, green development, material innovation, precision manufacturing and service-oriented transformation. It has formed a new industrial pattern featured by AI empowerment, full-link digital twin application, large-scale implementation of additive manufacturing and lightweight production, mandatory low-carbon upgrading, breakthroughs in ultra-precision manufacturing, and full-lifecycle value-based services.   1. In-depth Empowerment of Intelligent Manufacturing by Artificial Intelligence   2. Full-link Integration of Digital Twin & Industrial Internet 3. Large-scale Application of Additive Manufacturing & Lightweight Technology 4. Popularization of Green Manufacturing & Low-carbon Technologies 5. Breakthroughs in Precision & Ultra-precision Manufacturing 6. Service-oriented Manufacturing & Extended Full-lifecycle Value

April 25, 2026, Weifang — As a core foundational process in equipment manufacturing, investment casting (lost-wax casting) is undergoing structural transformation. With the global market exceeding 30 billion US dollars, China has become the industry’s core growth engine, driven by green development, intelligent manufacturing and high-end upgrading. Supported by MIIT’s green transformation plan, enterprises are promoting energy-saving technologies and low-carbon solutions, with strict environmental standards fully implemented. Intelligent technologies like 3D printing and AI quality inspection have been widely applied, improving production efficiency, casting yield and precision to meet high-end equipment requirements. Booming demand from new energy vehicles, aerospace and engineering machinery drives high-end market growth, accelerating domestic replacement of core components. Weifang, a key industrial cluster, boasts full-chain production capacity, with steady growth in domestic market share and over 20% year-on-year increase in overseas orders. Industry experts predict that the next 3-5 years will see elimination of backward capacity, with enterprises strong in R&D, quality control and green production leading the industry’s high-quality development.