The basic structure of the calender

The rubber calender machine is the basic equipment for the processing of rubber and plastic products. Among the rubber and plastic machinery, the calender is a high-heavy, high-precision machine. The following will introduce you the basic structure of the rubber calender.

Here is the content list:

•  What is the roller in the rubber calender?
•  What is the roller bearing of a rubber calender?
•  What is the frame of the rubber calender?

What is the roller in the rubber calender?

The roller is the main working part of the rubber calender, which directly affects the quality and output of the calendered product. Therefore, it must have high surface hardness, wear resistance, sufficient stiffness and hardness, good thermal conductivity, large heat transfer area, and high processing accuracy, and other features. The roller material of the rubber calender is generally made of chilled cast iron with high surface hardness and certain strength and toughness in the core. It is also made of cast steel, forged steel, and composite materials such as hard rigid surface and soft rigid core. In addition to the commonly used hollow structure of the rubber calender roller, there is also a drilling roller that drills along the working surface. Except for the embossing and embossing rollers, the surface shape of the roller is generally smooth.

What is the roller bearing of a rubber calender?

The roller bearing of the rubber calender has two types: sliding bearing and rolling bearing. Sliding bearing shafts have been widely used on roller bearing shafts of rubber calenders due to their simple structure, convenient manufacturing, and easy availability of materials. The sliding bearing is mainly composed of the bearing body, bushing, gland, and sealing end cover. Generally, pressure circulating thin oil lubrication is adopted. To prevent the leakage of lubricating oil, inner and outer oil retaining rings and sealing rings are installed on the roller journal. There is an oil collecting groove on the bearing body, which collects the leaked lubricating oil and returns to the oil tank through the oil pipe. The rubber calender adopts a rolling bearing shaft without the problems of journal wear and strain, which can save power consumption by about 10-20% and reduce the eccentricity and floating caused by the rotation of the roller. At the same time, the rolling bearing has a large load capacity and a long life, which can reduce maintenance costs. The disadvantage is that the rolling bearing is difficult to manufacture and the cost is high. When selecting a rolling bearing, pay attention to keeping a proper gap after heating during work, and make the bearing gaps installed at both ends of the roller consistent.

What is the frame of the rubber calender?

The structure of the frame of the rubber calender varies according to the number and arrangement of the rollers. However, to maintain greater rigidity and strength, various types of frames are generally made of closed hollow frames. The frame of the rubber calender is generally made of gray cast iron with high strength and good shock resistance and occasionally cast steel or ball-milled cast iron is used. Individual large-scale special-purpose frames are welded by thick steel plates, but they must be fully eliminated internal stress to avoid deformation.

Rubber calenders have been applied in more and more fields in production. Qingdao Huicai Machine Manufacture Co., Ltd. has developed a variety of Rubber calenders. If you want to buy one, you may want to consider using our products.