When exploring the manufacturing process of the rubber layer of steel wire braided rubber hoses, the molding temperature is undoubtedly an important factor. As the core component of the rubber hose structure, the performance of the rubber layer directly affects key indicators such as durability, compressive strength, and liquid corrosion resistance of the entire hose. The selection of liquid resistant synthetic rubber is based on its ability to maintain excellent physical and chemical properties in specific liquid environments, providing a solid protective barrier for rubber hoses. This article will elaborate on the molding temperature of the rubber layer, including material properties, process requirements, temperature control, and influencing factors.

1、 Characteristics of liquid resistant synthetic rubber

This type of rubber material usually has excellent properties such as oil resistance, solvent resistance, acid and alkali resistance, and can maintain stability in harsh chemical environments without being easily eroded or swollen. Its molecular structure has been specially designed to enhance the interaction force between rubber molecular chains, thereby improving the mechanical properties and aging resistance of the material. When selecting rubber materials, it is necessary to comprehensively consider the type of liquid, temperature range, and working pressure that the steel wire braided rubber hose will come into contact with, to ensure that the selected rubber can meet the usage requirements.

2、 The importance of rubber layer molding temperature

The molding temperature of the rubber layer refers to the suitable reaction temperature range that the rubber reaches during the vulcanization process. Vulcanization is a key step in rubber processing, which involves heating to crosslink rubber molecular chains and form a three-dimensional network structure, thereby endowing rubber with good physical and mechanical properties and chemical stability. The choice of molding temperature directly affects the rate and degree of vulcanization reaction, which in turn affects the performance of the rubber layer.

1. Low temperature: It can lead to incomplete vulcanization reaction and insufficient cross-linking density of the rubber layer, thereby affecting its strength, wear resistance, and aging resistance. In addition, rubber has poor fluidity at low temperatures, which is not conducive to filling and compaction during the molding process of rubber hoses, and can easily cause internal defects.

2. If the temperature is too high, it may cause excessive cross-linking or degradation of rubber molecular chains, which can also damage the performance of the rubber layer. High temperature may also accelerate the volatilization and decomposition of additives in rubber, leading to accelerated rubber aging and shortened service life.

3、 Technical points of temperature control

To ensure the success of rubber layer molding, it is necessary to accurately control the temperature during the vulcanization process, which usually involves the following aspects:

1. Preheating stage: Before formal vulcanization, the rubber needs to be preheated to improve its internal temperature uniformity and reduce temperature gradients during the vulcanization process. The preheating temperature should be lower than the vulcanization temperature to avoid premature crosslinking of rubber.

2. Sulfurization temperature setting: Determine the appropriate vulcanization temperature based on the vulcanization curve of the selected rubber and the design requirements of the steel wire braided rubber hose, which usually requires experimentation or consulting relevant information. The selection of vulcanization temperature should ensure that the rubber molecular chains can fully crosslink while avoiding excessive crosslinking or degradation.

3. Temperature uniformity: During the vulcanization process, it is necessary to ensure that the temperature of each part of the hose is uniform and consistent. This requires vulcanization equipment to have good temperature control capability and thermal conductivity to avoid differences in rubber layer performance caused by uneven temperature.

4. Time control: The vulcanization time is also an important factor affecting the performance of the rubber layer. Too short a vulcanization time can lead to incomplete vulcanization, while too long a vulcanization time may cause excessive cross-linking. Therefore, it is necessary to set the vulcanization time reasonably based on the vulcanization temperature and rubber characteristics.

4、 Influencing factors and countermeasures

In actual production, the control of rubber layer molding temperature is also influenced by various factors, such as rubber formula, type and dosage of vulcanizing agent, properties and flow rate of vulcanizing medium (such as steam, hot air, etc.). The following measures can be taken to address these factors:

1. Optimizing rubber formula: By adjusting formula parameters such as rubber type, filler type and dosage, and vulcanization system, the processing and vulcanization properties of rubber can be improved.

2. Selecting the appropriate vulcanizing agent: Select the appropriate vulcanizing agent based on the characteristics and usage requirements of the rubber, and strictly control its dosage to ensure the smooth progress of the vulcanization reaction.

3. Improve vulcanization equipment: Adopt advanced vulcanization equipment and processes to improve the accuracy and stability of temperature control, and reduce temperature fluctuations during the vulcanization process.

4. Strengthen process monitoring: By monitoring parameters such as temperature and pressure during the vulcanization process online, adjust process conditions in a timely manner to ensure the success of rubber layer molding.

The molding temperature of the rubber layer of the steel wire braided rubber hose is an important step in the production process of the hose. By deeply understanding the characteristics of liquid resistant synthetic rubber, accurately controlling the temperature during the vulcanization process, optimizing the rubber formula and vulcanization process, and other measures, products with excellent performance and reliable quality can be prepared.