Woven bags are widely used in the packaging of fertilizers, cement and chemical products. Such as cement woven bags, during the production and processing of cement woven bags, it is necessary to fold the valve opening and ash retaining strips of the blank of the cement woven bag toward the inside of the bag, so that the sealed cement bag can still be filled with cement and reduce The possibility of spilling. However, manual folding is generally used for valve opening hemming, which is not only inefficient, but also very labor-intensive, with different folding shapes and high labor costs.

Technical realization elements:

The purpose of the utility model is to provide a valve port corner folding device on a valve port woven bag automatic creasing machine, which can automatically fold the valve port edge, has a simple structure, and can reduce wrinkles after the valve port is automatically folded. Uniform and good quality.

In order to achieve the above purpose, the technical solution adopted by the present utility model is: a valve opening angle folding device on a valve opening woven bag automatic creasing machine, characterized in that: the valve opening angle folding device includes a reciprocating swing angle knife and a driving angle folding device The drive assembly of the knife swing, the outer contour of the corner folding knife is connected end to end by a straight edge and a curved edge; the corner folding knife is provided with several grooves, and the grooves are evenly spaced along the straight edge of the corner folding knife , And the groove communicates with the straight edge of the corner knife; the groove is provided with a roller structure, the upper surface of the roller structure is lower than the upper surface of the corner knife, or is flush with the upper surface of the corner knife; the roller structure includes The roller and the roller shaft, the roller shaft are vertically fixed in the groove, the roller can be horizontally rotatably sleeved on the roller shaft, and the roller is axially fixed on the roller shaft.

The utility model is further arranged that the outer contour of the roller is tangent to the vertical plane where the straight edge of the corner knife is located.

The utility model is further provided that the roller can adopt a ball bearing structure.

The utility model has the beneficial effects: the corner folding knife can be driven by the drive assembly to automatically rotate the folding valve opening edge folding, and the roller structure can be set so that when the corner folding knife rotates, the roller will contact the peeled valve opening folding edge to generate friction, and follow the corner knife The rotating roller will rotate in the opposite direction with respect to the corner folding knife, so that the wrinkled valve port flange will be flattened with the rotation of the roller, ensuring that the valve port flange will not be wrinkled during folding and ensuring the quality of the bag.

Technical features:

1. A valve port angle folding device on a valve port woven bag automatic creasing machine, characterized in that: the valve port angle folding device includes a reciprocating swingable corner knife and a drive assembly that drives the corner knife to swing. The contour is connected end to end by a straight edge and a curved edge; the corner folding knife is provided with a number of grooves, the grooves are evenly spaced along the straight edge of the corner folding knife, and the grooves are connected with the straight edge of the corner folding knife; The groove is provided with a roller structure, the upper surface of the roller structure is lower than the upper surface of the corner knife, or is flush with the upper surface of the corner knife; the roller structure includes a roller and a roller shaft, the roller shaft is vertically fixed in the concave In the groove, the roller is sleeved on the roller shaft so that it can rotate horizontally, and the roller is axially fixed on the roller shaft.

2. A valve port corner folding device on a valve port woven bag automatic creasing machine according to claim 1, wherein the outer contour of the roller is tangent to the vertical plane where the straight edge of the corner knife is located.

3. A valve port angle folding device on a valve port woven bag automatic creasing machine according to claim 1, wherein the roller can adopt a ball bearing structure.

The utility model discloses a valve port angle folding device on a valve port woven bag automatic creasing machine. The valve port angle folding device includes a reciprocating swing corner knife and a drive assembly that drives the corner knife to swing. The outer contour of the corner knife is formed by a straight line. The edge and a curved edge are connected end to end; a number of grooves are provided on the corner folding knife, and the grooves are evenly spaced along the straight edge of the corner folding knife, and the grooves are connected with the straight edge of the corner folding knife; a roller structure is arranged in the groove , The upper surface of the roller structure is lower than the upper surface of the corner knife, or is flush with the upper surface of the corner knife; the roller structure includes a roller and a roller shaft, the roller shaft is vertically fixed in the groove, and the roller can be set in a horizontally rotatable sleeve On the roller shaft, and the roller is axially fixed on the roller shaft. The technical problem to be solved by the utility model is to provide a valve opening corner folding device on a valve opening woven bag automatic creasing machine, which can automatically fold the valve opening and fold the edges, has a simple structure, and can reduce wrinkles after the valve opening is automatically folded , The folded shape is uniform and the quality is good.