Latest composite rubber mixing extrusion calendering sheet machine/rubber roller head extruder

1.Rubber roller head extruder introduce:
The rubber mixing, extruding and sheeting machine is a mechanical device that integrates the three processes of rubber mixing, extrusion and sheeting. The following is a detailed introduction about it:

1. Working principle:
- Mixing part: Usually two rollers rotating relative to each other at different speeds are used to extrude, shear and tear the rubber raw materials. When the rubber raw materials are added between the rollers, under the action of friction and adhesion, the rubber molecular chains are broken and rearranged, and various compounding agents (such as vulcanizers, accelerators, fillers, etc.) can be evenly dispersed in the rubber matrix to achieve rubber mixing, so that the performance of the rubber meets the requirements of subsequent processing.
- Extrusion part: The rubber after mixing enters the extrusion system, and the rubber is generally pushed forward in the barrel by the rotation of the screw. The structural design and rotation speed of the screw determine the extrusion pressure, extrusion speed and extrusion volume of the rubber. During the extrusion process, the rubber is further sheared and plasticized to make its texture more uniform and can be extruded from the extruder head according to the preset shape and size.
- Sheeting part: The rubber strip or rubber sheet extruded from the extruder head directly enters the sheeting device, which is usually composed of a set of parallel rollers. Under the extrusion of the rollers, the rubber is pressed into a rubber sheet with a specific thickness and width. The pressure and spacing of the rollers can be adjusted according to production requirements to ensure the quality and dimensional accuracy of the rubber sheet.
2. Structural composition:
- Mixing device:
- Roller: It is the core component of mixing. It is generally made of alloy chilled cast iron and other materials. It has high hardness and wear resistance and can withstand the huge pressure and friction during rubber mixing.
- Roller spacing adjustment device: It is used to adjust the spacing between the two rollers to meet the mixing requirements of different batches of rubber raw materials and different mixing process requirements.
- Heating and cooling system: The rollers can be heated or cooled to control the mixing temperature of the rubber. For example, when mixing certain special rubber materials, the roller needs to be heated to a certain temperature first to make the rubber easier to plasticize and mix; and during the mixing process, if the temperature is too high, the roller temperature needs to be lowered through the cooling system to prevent the rubber from overheating and scorching.
- Extrusion device:
- Screw: It is a key component of the extrusion part. Its shape, pitch, screw diameter and other parameters directly affect the extrusion effect of the rubber. The screw is usually divided into a feeding section, a melting section and a homogenizing section. The functions and structural designs of each section are different to achieve smooth extrusion and plasticization of the rubber.
- Barrel: It wraps the screw and provides a closed space for the extrusion of the rubber. Heating and cooling devices are usually provided inside the barrel to control the temperature of the rubber during the extrusion process.
- Extruder head: It is connected to the outlet end of the barrel. Its shape and size determine the shape and size of the extruded rubber. Common extruder heads are round, square, flat, etc.
- Sheeting device:
- Pressing roller: It consists of two or more parallel rollers with a smooth surface to ensure that the surface of the rubber is flat after sheeting. The diameter and length of the pressing roller are selected according to the production capacity of the equipment and the size requirements of the rubber sheet.
- Pressure adjustment system: used to adjust the pressure between the pressing rollers to control the thickness of the rubber sheet. The pressure adjustment system can be manual or automatic. The automatic pressure adjustment system can automatically adjust the pressure of the pressing roller according to the preset pressure value to improve the stability and accuracy of production.
3. Advantages:
- Improve production efficiency: Integrating the three processes of mixing, extrusion and tableting on one device reduces the transfer time and operation links of rubber between different equipment, greatly improves production efficiency, and is especially suitable for large-scale rubber product production.
- Ensure product quality: The entire production process is carried out continuously on the same equipment, avoiding the possible contamination and oxidation of rubber when transferring between different equipment, which is conducive to ensuring the quality stability of rubber products. At the same time, the equipment has a high degree of automation and can accurately control the process parameters of mixing, extrusion and tableting, making the quality of rubber products more reliable.
- Save space and cost: Compared with purchasing three equipments of mixer, extruder and tableting machine separately, the rubber mixing, extrusion and tableting machine occupies a small area and saves space in the production workshop. Moreover, the purchase cost and maintenance cost of a piece of equipment are relatively low, which reduces the investment cost and operating cost of the enterprise.
4. Application field: It is widely used in the rubber products industry, such as manufacturing rubber plates, rubber sheets, rubber strips, rubber tubes and other products. It also plays an important role in the production of rubber parts in the fields of automobiles, electronics, construction, machinery, etc. For example, the rubber lining of automobile tires, rubber seals in electronic equipment, rubber sealing strips of building doors and windows, etc., can all be produced using a rubber mixing, extrusion and sheeting machine.

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