800ton Pressure Rubber Vulcanizing Machine And Hot Press Molding Machine For Rubber Fender Manufacturing

1. Heating Mechanism
   • The press is equipped with a heating system, usually through electric heating elements, steam, or thermo - oil. The heat is transferred to the platens (the large, flat surfaces of the press). The platens are made of high - quality steel with excellent heat - conducting properties. The temperature is carefully controlled to reach the vulcanization temperature range of the rubber. For example, most rubber fender vulcanization requires a temperature between 140 - 160°C.
2. Pressurization Process
   • A hydraulic or mechanical system is used to apply pressure. The hydraulic system consists of a hydraulic pump, cylinders, valves, and hoses. The pressure forces the rubber material, which is placed in a mold cavity, to conform to the shape of the mold and ensures that the rubber molecules are in close contact. This is essential for the vulcanization reaction to occur uniformly throughout the rubber mass. The pressure can range from a few tons to several hundred tons depending on the size and type of the rubber fender being produced.
3. Vulcanization Reaction
   • During the vulcanization process, the rubber molecules react with sulfur or other vulcanizing agents under the combined action of heat and pressure. This cross - linking reaction transforms the rubber from a soft and pliable material with relatively poor mechanical properties into a tough and durable product. The cross - links formed between the rubber chains give the rubber fender its characteristic strength, elasticity, and resistance to abrasion and environmental degradation.

1. Platen Assembly
   • The platens are the main heating and pressing surfaces. They are designed to provide even heat distribution and parallel alignment to ensure uniform pressure on the mold. The surface of the platens is usually precision - machined to have a high - quality finish, which helps in the transfer of heat and pressure and also in the production of smooth - surfaced rubber fenders.
2. Hydraulic System
   • As mentioned earlier, the hydraulic system is a key component. The hydraulic pump supplies the necessary pressure to the cylinders. The cylinders are connected to the movable platen (usually the upper platen) and are responsible for the opening and closing of the press and the application of pressure during the vulcanization process. The hydraulic valves control the flow of hydraulic fluid to regulate the speed and force of the platen movement and pressure application.
3. Mold System
   • The mold is designed according to the specific shape and dimensions of the rubber fender. It is usually made of high - strength steel and is precisely machined to ensure the accurate formation of the fender. The mold has channels and vents to allow for the escape of air and any volatile substances generated during the vulcanization process. This is crucial to prevent the formation of air bubbles or voids in the rubber fender, which could affect its performance.
4. Control System
   • The control system of the press is becoming increasingly sophisticated. It typically uses a Programmable Logic Controller (PLC) to manage the various operations such as temperature control, pressure regulation, and time - based functions. The operator can set the desired vulcanization temperature, pressure, and time through a touch - screen interface. The control system also monitors the actual operating parameters and provides alarms and safety shutdowns in case of any abnormal conditions such as over - temperature, over - pressure, or equipment malfunction.

1. Maritime Industry
   • Rubber fender vulcanizing molding presses are used to produce a wide range of rubber fenders for ships and docks. These fenders are installed on the sides of docks and on the hulls of ships to absorb the impact energy when a ship berths. Different types of rubber fenders, such as cylindrical fenders, arch fenders, and cell - type fenders, can be produced using these presses to meet the specific requirements of different docking situations and ship sizes.
2. Industrial Facilities
   • In addition to maritime applications, they are also used in industrial settings where shock absorption and protection of structures are needed. For example, in some factories where heavy equipment or vehicles are moved around, custom - made rubber fenders or bumpers can be produced using these presses to prevent damage to the equipment and the building structures.

1. Quality Control
   • The precise control of temperature, pressure, and time during the vulcanization process ensures consistent product quality. The rubber fenders produced have reliable mechanical and physical properties, which is crucial for their long - term performance in harsh marine environments.
2. Efficiency
   • Modern vulcanizing molding presses are designed for high - productivity manufacturing. They can complete the vulcanization process in a relatively short time, depending on the size and complexity of the fender. The automated control systems also reduce the need for extensive manual labor, increasing overall production efficiency.
3. Versatility
   • These presses can be adjusted to produce different types and sizes of rubber fenders. By changing the mold, a wide variety of shapes and configurations can be achieved, allowing manufacturers to meet the diverse needs of the market.