printing equipment

The printing equipment is mainly composed of paper feeding device, printing device, paper receiving device and other devices. The following is a detailed introduction to the four characteristics of printing equipment.

Folding paper feeding device

The paper feeding device is a device for installing, continuously supplying and replacing web paper, mainly including: web paper support device, paper loading device and paper receiving device (sheet, web)

a. Most web supporting devices are supported by the center of the Web:

(1) mandrel for roller support

① Tapered mandrel.

② Expansion mandrel. (2) no mandrel support device. It is mainly used for large printing presses.

(3) mandrel support seat.

b. During the printing process, the diameter of the web paper gradually decreases until a new web paper needs to be replaced.

(1) form of upper paper arm. According to the number of web paper that can be installed by the paper feeding device, it can be divided into three forms: single arm type, double arm type and three arm type

(2) pneumatic paper feeding mechanism. The pneumatic paper loading mechanism is powered by compressed air and drives the paper loading arm through the pneumatic device to realize the lifting and lowering of the paper loading arm

(3) electric paper feeding mechanism. The mechanism is composed of motor and mechanical transmission device

c. When using web paper for long version live printing, it is not only required to replace the web paper without shutdown, but also stick it under the condition of constant speed of new and old paper tapes to complete the whole process of paper replacement. Therefore, an automatic paper receiving device without shutdown is generally set.