Classification and Maintenance of Plastic Woven Bag Equipment

A manufacturer of integrated cutting, printing, and collecting machines for woven bags tells you: Plastic woven bag equipment uses plastic flat yarn, also known as cut fiber in the plastic weaving industry. It is the basic material for producing plastic woven bags. Flat yarn is made from specific types of polypropylene and polyethylene resin through melt extrusion into a film, then longitudinally cut into strips, heated, stretched, oriented, and shaped before being wound into flat yarn spindles for weaving. The woven fabric is then printed, cut, and sewn to become woven bags. Depending on the equipment used, cutting can be done before printing, or printing can be done before cutting. Automatic cutting and sewing can continuously complete printing, cutting, and sewing processes, and can also produce valve bags, bottom-filled bags, etc. For plain woven fabrics, center seam bonding can be performed before bag making.

The main process parameters for plastic woven bag manufacturing are external dimensional tolerances, tensile strength in the bottom and side seams, clarity of printing ink and cleanliness of other parts after printing, accuracy of plate position, stitching, stitch length, and requirements for defects such as needle slippage and thread breakage.

Establish machine maintenance regulations. Offset printing machine maintenance should be based on the machine's instruction manual. This includes regular oil changes, filter cleaning, and periodic machine precision checks.

Strengthen the maintenance of critical components. Gears, cams, sprockets, rollers, and bearings are important parts of the printing press, and their maintenance differs from other parts because changes in their precision will affect performance. Springs are the most common components used in the force balancing mechanism of the machine. Their performance directly determines the precision of the interaction between moving parts. Springs must have sensitive elasticity; hysteresis and irreversible plastic deformation are extremely detrimental to their operation. If any of these problems are found, the spring must be replaced immediately. The hazards of solvent residue during the printing process.

Technological reforms and improved machine maintenance are necessary. Machine maintenance requires that the machine be designed with ease of maintenance in mind. However, due to the complexity of printing presses, it is impossible to consider every factor, and the content of machine maintenance will also change with environmental changes. Therefore, structural modifications that hinder machine maintenance should be made without affecting normal operation.