Excerpted from the Internet, for reference only
1. Rolling guide
(1) Structural form and characteristics of rolling guides Rolling guides can be divided into ball guides, needle guides and roller guides according to the shape of the rolling elements.
The ball guide rail is easy to manufacture and low in cost, but has a small contact area and low rigidity, so it has a small bearing capacity. It is suitable for automatic vacuum packaging machines with small moving parts and relatively small production capacity, such as rolling vacuum packaging machines.
Needle roller guides have large bearing capacity, small size and compact structure, but are difficult to manufacture and are often used in occasions where the size is limited.
The rolling guide has a high bearing capacity and is easy to manufacture, and is a guide that is widely used in vacuum packaging machines.
2. Sliding rails
Sliding guide rail: Due to the complex structure, high cost, poor anti-vibration ability and insufficient rigidity of rolling guide rails, sliding guide rails are also widely used in automatic vacuum packaging machines. The sliding guide rail of the automatic vacuum packaging machine no longer adopts the traditional cast iron-cast iron sliding guide rail, but adopts the plastic-coated guide rail made by pasting the plastic soft tape with basically the same dynamic and static friction coefficient on the surface of the guide rail, which is wear-resistant and vibration-absorbing, or It is an injection-molded guide rail made of injection molding on the surface of the guide rail. The plastic-coated guide rail and the injection-molded guide rail are collectively referred to as the plastic guide rail. Plastic rails have many advantages, mainly in the following aspects: