Chapter 84 is one of the broadest chapters in the HS classification, covering various machines, mechanical appliances, nuclear reactors, boilers, internal combustion engines, pumps, compressors, fans, air conditioners, filtering equipment, washing machines, printing machines, textile machinery, machine tools, office equipment, automatic data processing equipment, electric motors, generators, transformers, welding equipment, etc. Machinery in this chapter generally features power drive, moving parts, and specific functions, and is not classified under other more specific chapters. Heading 8477 covers machinery for working rubber or plastics or for the manufacture of products from these materials, not specified or included elsewhere in this chapter, including injection molding machines, extruders, blow molding machines, calenders, tire building machines, vulcanizing machines, etc. These machines are used to process rubber or plastic raw materials into semi-finished or finished products through heating, pressing, molding, and other processes. Machines under this heading generally have independent processing functions and do not involve material removal (such as cutting) or chemical synthesis. The first 2 digits 84 represent Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Digits 3-4, 77, represent heading 8477, referring to machinery for working rubber or plastics or for the manufacture of products from these materials, not specified or included elsewhere in this chapter. Digits 5-6, 51, represent subheading 847751, specifically referring to tire building machines. This subheading is generally not further subdivided, but may have further statistical codes based on the type of tire being processed or the process. A tire building machine is a machine specifically used to assemble tire components (such as carcass, belt layers, tread) into a green tire. Tire building machines are rubber processing machines used to assemble rubber components into green tires, rather than through general plastic processing methods such as injection molding or extrusion. They do not meet the definitions of other subheadings under 8477 (such as injection molding machines 847710, extruders 847720, blow molding machines 847730), and are therefore classified under 847751. At the same time, they are not tire vulcanizing machines (usually classified under 847780) or tire repair equipment.

Product Name: The Chinese and English names of the declared commodity, which should accurately reflect the purpose and function of the machine, such as "Tire building machine". Use: Explain what type of tires the machine is used to produce (such as automobile tires, motorcycle tires, aircraft tires) and the specific process in tire manufacturing (such as green tire building). Working Principle: Briefly describe how the machine applies, rolls, and assembles rubber components into a green tire, for example, "through drum rotation, the carcass, belt layers, tread and other components are applied in sequence". Brand: Fill in the machine brand (such as VMI, Softcontrol, Harburg-Freudenberger, etc.). If there is no brand, fill in "no brand". Model: Fill in the specific model, such as "VMI MAXX", "LCZ-3", etc., which should be consistent with the machine nameplate. Specifications and Dimensions: Provide the main dimensional parameters of the machine, such as building drum diameter range, maximum tire diameter, machine overall dimensions, etc. Power: Fill in the total power of the machine (kW), which helps determine the machine type and specifications. Year of Manufacture: Fill in the year the machine was manufactured. For new machines, fill in the current year; for second-hand machines, indicate the actual year. Product Name: Tire building machine; Use: For green tire building of automobile tires; Working Principle: Through building drum rotation, the carcass, belt layers, tread and other rubber components are applied and rolled in sequence into a green tire; Brand: VMI; Model: MAXX; Specifications and Dimensions: Building drum diameter range 16-24 inches, maximum tire diameter 1200mm, overall dimensions 8000×4000×3000mm; Power: 75kW; Year of Manufacture: 2023. Failing to distinguish tire building machines from tire vulcanizing machines, incorrectly classifying vulcanizing machines under 847751. Declaring as "tire production equipment" which is too broad, without clarifying the building function, easily classified under other headings. Second-hand machines not truthfully declaring the year of manufacture, leading to errors in customs valuation and tariff application. Omitting key elements such as brand and model, affecting the accuracy of customs commodity classification.

The core basis for classification is the function of the machine: whether it is specifically used to assemble rubber components into green tires. According to HS notes, 8477 includes rubber or plastic processing machines, and 847751 is specifically for tire building machines. When determining, it is necessary to confirm whether the machine has features such as a building drum and application devices, and does not perform vulcanization or material removal. If the machine has both building and vulcanizing functions, it needs to be determined based on the primary function or whether it is a composite machine, usually classified according to the primary function. 847710 Injection molding machine: Injection molding machines are used to inject plastic or rubber into molds for molding, while tire building machines apply components and do not involve injection molding. 847720 Extruder: Extruders are used for continuous extrusion of rubber or plastic profiles. Tire building machines do not extrude but assemble pre-formed components. 847730 Blow molding machine: Blow molding machines are used for hollow molding. Tire building machines do not involve blow molding processes. 847780 Other rubber or plastic processing machines: This subheading includes vulcanizing machines, cutting machines, etc. Tire building machines are specifically for green tire building and do not perform vulcanization or cutting. 847759 Other molding machines: 847759 covers other molding machines not elsewhere specified, such as plastic molding machines, but tire building machines are separately listed because they are specifically for tires. Is the machine used to assemble rubber components into green tires? Does it have tire building features such as a building drum and application devices? Does it not involve injection molding, extrusion, blow molding, or other processes? Does it not perform vulcanization or material removal? Is it clearly distinguished from other subheadings under 8477 (such as vulcanizing machines)?

Tire building machines are classified under 847751, so what code are tire vulcanizing machines classified under? Tire vulcanizing machines are usually classified under 847780 (other rubber or plastic processing machines), because vulcanization is a rubber cross-linking process and does not belong to building. If a vulcanizing machine and a building machine are combined into one unit, it needs to be classified according to the primary function or composite machine rules, and may still be classified under 847751 or 847780. How to inquire about the import tariff rate for 847751? Through the official website of the General Administration of Customs of China, the International Trade Single Window, or professional tariff inquiry tools, enter HS code 847751 to view the MFN rate, general rate, VAT rate, etc. Note that tariff rates may change, and it is recommended to refer to the latest tariff schedule. What special requirements are there for import declaration of second-hand tire building machines? Second-hand machines require a pre-shipment inspection certificate. When declaring, truthfully fill in the year of manufacture, duration of use, condition rate, etc. Customs may conduct valuation, and some used mechanical and electrical products are prohibited or restricted from import, so regulatory conditions need to be confirmed in advance. Are tire building machines and tire repair equipment classified under the same code? No. Tire repair equipment is usually classified under 847780 or other headings, because its function is repair rather than building. 847751 specifically refers to building machines used to manufacture new tire green tires. If a tire building machine has an automatic control system, does it affect classification? No. Classification is based on the primary function of the machine. The automatic control system is an auxiliary component and it is still classified under 847751. However, if the machine also has other processing functions, it needs to be determined according to the primary function or composite machine rules. What is the difference between 847751 and 847759? 847751 specifically refers to tire building machines, while 847759 refers to other rubber or plastic molding machines not elsewhere specified, such as plastic blow molding machines, compression molding machines, etc. Tire building machines are separately listed because they are specifically for tires. What elements need to be declared for exporting tire building machines? Export declaration elements are similar to imports, including product name, use, working principle, brand, model, specifications and dimensions, power, year of manufacture, etc. Export customs declaration forms, invoices, packing lists, etc. are also required. Are tire building machines classified under 847751 subject to export controls? Generally not controlled, but if they involve dual-use items or specific technical parameters, an export license may be required. It is recommended to check the China Export Control List or consult a professional customs broker.