Precision Investment Casting: Weifang Junlong Machinery Expands Its Global Market for High‑End Equipment Components

Recently, the workshops of Weifang Junlong Machinery Co., Ltd. have been operating at full capacity. Multiple production lines for silica‑sol precision casting are running steadily. A batch of alloy‑steel precision castings for construction machinery, petroleum equipment and agricultural machinery has passed final quality inspection and is ready for shipment to domestic and overseas customers. As an established manufacturer specializing in investment casting in Weifang, Shandong, the enterprise supplies high‑quality custom non‑standard castings for worldwide clients with mature lost‑wax casting technology and strict quality‑control systems.Precision investment casting, also known as lost‑wax casting, is an advanced near‑net‑shape manufacturing process. Its workflow covers wax‑pattern injection, wax‑tree assembly, multi‑layer shell‑making, dewaxing, high‑temperature shell firing, molten‑metal pouring, shake‑out cleaning and post‑treatment. Compared with conventional sand casting, investment‑cast parts feature high dimensional accuracy, excellent surface finish and minimal machining allowance. It can produce components with complex shapes, curved surfaces and deep inner cavities that are difficult to form by pure machining.According to the company’s technical team, the factory can produce castings in carbon steel, 42CrMo alloy steel, WCB, GS235, IC1030, 304/316L stainless steel, ductile iron and other materials. Its product portfolio mainly includes four major categories: full‑range structural parts for forklifts, brackets, lifting lugs and yoke joints for construction machinery, underground cable protectors and pipeline components for the petroleum industry, as well as agricultural‑machinery hooks and housing castings for transmission systems. It also supplies marine fittings, truck suspension parts, industrial mixing blades, bearing housings and other general mechanical components. One‑stop services combining casting and CNC machining are available for finished‑part delivery.Quality control is implemented throughout the whole production process. Inspection and spot‑checks are carried out at every stage, including wax‑pattern dimension testing, temperature‑humidity monitoring of ceramic shells, pre‑furnace spectral analysis of molten steel, pouring‑speed regulation and firing‑temperature control. These measures effectively reduce common casting defects such as porosity, shrinkage cavities and sand inclusions. Material composition certificates, mechanical‑performance test reports and optional UT/PT non‑destructive testing reports can be provided to meet strict audit requirements for European and American export projects.With an annual production capacity of 9,000‑10,000 tons after more than ten years of development, Weifang Junlong Machinery has exported its castings to more than 20 countries and regions, becoming a long‑term reliable casting supplier for numerous overseas equipment manufacturers. In the next stage, the company plans to further optimize its silica‑sol and water‑glass composite casting processes, increase investment in automated production equipment and expand its product range for new‑energy and mining‑equipment sectors. It will keep delivering high‑quality precision castings and contribute to the high‑quality development of the high‑end equipment‑manufacturing industry.