Talking about: Acceptance of Used Printing Equipment

1. Inspection machine

Here's a summary of the key points for buying second-hand printing equipment.

First, listen to the supplier's overall introduction to the equipment and identify the problem:

The second is to look at the quality of the equipment itself, including the appearance of the equipment, the internal relationship of the parts, and the quality of the printing. First of all, look at the main part of the printing press—the platen (including the printing plate, the eraser, and the embossing roller)—whether the gears have broken teeth, whether the sleeves are worn, and whether the surface of the rollers has dents. Bruising, corrosion, welding, electroplating traces; Check the gear's accuracy and wear; According to the accessories manual to see whether the spare parts are complete; Check iron tandem roller, string water roller, ink roller, water roller is seriously aging View the appearance of the machine, that is, whether the fuselage and the chassis have scars; view the degree of cam wear, whether there is a break pin. Insufficient sales, breakage of connecting rods and welding repairs, etc.

Printing companies need to inspect machines, and second-hand printing equipment suppliers must also inspect machines. This is necessary for equipment sales. Mr. Pan Zhikai’s experience is: “We will carry out some debugging of imported used equipment and replace the defective parts. These parts need to be imported from suppliers through foreign countries. Otherwise, the equipment cannot be used normally, and the loss of users will be very large. Reputation will also be affected." Therefore, the user should also make necessary inquiries and inspections on the components that need to be replaced in order to purchase used equipment.

2. Test machine

Intuitive inspection alone does not guarantee the quality of the printing. When the user purchases or the equipment is purchased by the supplier, the quality of the equipment must be verified by printing on the machine. Li Weizhai teacher emphasized. Checking the printing quality is a key step in checking the quality of second-hand printing equipment, such as whether the overprint of the printed matter is accurate, whether the dot reversal is clear, and whether there are ink bars or the like. The specific test machine test includes:

(1) After the device is started up, listen for abnormal sounds, see if the moving parts move freely, and whether the cams, gears, etc., have beats or other abnormal phenomena;

(2) Check whether Feida is normal and whether the speed of paper feeding is stable;

(3) Check the effect of printed materials, whether there are ink bars, water bars, and whether the outlets are clear. Full, whether there is uneven ink, overprinting is accurate and so on. It is usually required that the overprint tolerance of fine products is less than 0.15mm, and the overprint tolerance of general products is less than 0.30mm.