Production technology rubber products

1, rubber basic process

With the rapid development of modern industry, especially the chemical industry, rubber variety, but its production process, but basically the same. In general solid rubber (gum) as raw product, its production process including:

Raw material preparation → mastication → mixing → forming → curing → break → Inspection

2, rubber raw material preparation

The main material of their remaining gum rubber products, with agents, fibrous materials and metal materials. Wherein the gum as the basic material; complexing agent in order to improve certain properties of rubber products and adding auxiliary materials; fibrous materials (cotton, linen, wool and a variety of man-made fibers, synthetic fibers) and metal materials (steel, copper) as a reinforcing material of rubber products, in order to enhance the mechanical strength, limit product variants.

In the raw material preparation process, in accordance with Formulation ingredients must be accurate. In order to make raw rubber and compounding agents can be uniformly mixed with each other, the need for certain materials for processing:

To bake soft gum within 60--70 ? drying room, then cut gum, broken plastic into small pieces;

Bulk compounding agents such as paraffin, stearic acid, rosin to crush;

Powdered ingredients to be screened if they contain mechanical removal of the impurities or coarse;

Liquid ingredients (pine tar, coumarone) need to be heated, melted and evaporated moisture, filter impurities;

Complexing agent to be dried, otherwise easy to agglomerate, during kneading old not distributed evenly, bubbles during vulcanization, thereby affecting the quality of products;

3, rubber mastication

Raw rubber elasticity, lack of essential properties (plasticity) during processing, it is not easy to process. In order to improve the plasticity of the raw rubber so mastication; so, when it is easy kneading ingredients uniformly dispersed in raw rubber; Meanwhile, calendering, molding process also helps to improve rubber penetration (infiltration fiber fabric inside) and forming mobility. The long-chain molecules raw rubber degradation, the formation of a process called plasticity mastication. Raw rubber mastication methods are mechanical mastication and thermoplastic mixing two kinds. Mechanical mastication is not too high in temperature by the action of mechanical compression and friction of mastication machine, so the long-chain rubber molecules shorter degradation by high elastic state to the plastic state. Thermoplastic raw rubber mixing is to pass into the hot air, under the action of heat and oxygen, so that degradation shorter long-chain molecules, thereby obtaining plasticity.

4, rubber mixing

In order to adapt to different conditions, access to a variety of performance, but also to improve the performance of rubber products and reduce costs, we must add different ingredients in the raw rubber. After kneading is to mastication of raw rubber with the agent is mixed with, on the mixing machine by mechanical mixing action, so with the agent completely, uniformly dispersed in raw rubber in one process. Mixing rubber production is an important step in the process, if uneven mix, can not fully play the role of rubber and compounding agents, affect product performance. After kneading the resulting compound, known as the rubber, which is manufacturing all kinds of rubber products semi-finished materials, commonly known as plastic materials, typically are sold as a commodity, buyers can take advantage of direct processing rubber molding into vulcanization We need rubber products. Depending on the recipe, mix a range of different properties of different brands and varieties of choices.