CN204714187U - A kind of crowned roll of cutting paper for centre - Google Patents

Abstract

The utility model discloses a medium-height roller used for cutting paper in the middle, which comprises a roller body, which is characterized in that the middle of the roller body is thick, and the two ends are thin, forming two conical bodies whose bottom faces meet, and the cone body The taper angle is between 0.4-0.5 degrees, and the surface roughness is between Ra1.6-Ra0.8. After the paper is cut, it winds around this roller. Since the middle of the roller is thick and both ends are thin, it has a certain taper. The paper will be slightly separated to both sides at the cutting position under the traction of tension, and a 3-5 mm gap will appear in the middle. After being wound on an air expansion shaft, it will also be separated in the middle, so as not to overlap each other, and the two rolls of paper can be easily separated after cutting. The utility model has the advantage that after the slitting is completed, only one middle-high roller is needed to easily separate the two rolls of paper.

Description

A middle-high roller for middle slitting paper

technical field

The utility model relates to a middle-high roller used for cutting paper in the middle.

Background technique

The packaging industry often slits the web in the middle, which is commonly called "folio" in the industry, that is, one roll of web with a width of W is cut and wound into two rolls with a width of W/2. Now the usual slitting method is to place a roll of web with a wide width of W on the side reel of the slitting machine, cut it in the middle with a slitting knife, and wind it on the upper and lower air shafts until the whole roll is divided. Finished cutting.

Part of the slitting equipment has only one winding air shaft. If the two rolls of paper after slitting are wound on one winding air shaft, it will cause the two rolls of paper to overlap each other at the middle cut position during the cutting process. Laminate and press 1-3 mm, and the two rolls of paper cannot be separated after cutting.

Utility model content

The purpose of the utility model is to provide a medium-high roller for cutting paper in the middle, and the two rolls of paper can be easily separated after cutting.

In order to achieve the above object, the technical solution of the present utility model is as follows: a medium-high roller for cutting paper in the middle, including a roller body, which is characterized in that the middle of the roller body is thick, and the two ends are thin, forming two bottom faces. Cone, the taper angle of the cone is between 0.4-0.5 degrees, and the surface roughness is between Ra1.6-Ra0.8.

After the paper is cut, it winds around this roller. Since the middle of the roller is thick and both ends are thin, it has a certain taper. The paper will be slightly separated to both sides at the cutting position under tension traction, and a gap of 3-5mm will appear in the middle. After being wound on an air expansion shaft, it will also be separated in the middle, so as not to overlap each other, and the two rolls of paper can be easily separated after cutting. The utility model has the advantage that after the slitting is completed, only one middle-high roller is needed to easily separate the two rolls of paper.

Description of drawings

Fig. 1 is the structural representation of the utility model.

The picture includes:

1. Paper,

2. Cutter,

3. Guide roller,

4. Medium and high rollers,

5. Inflatable shaft.

Detailed ways

The following is a brief description of the connection structure and working principle of the product in conjunction with the accompanying drawings.

A medium-height roller for cutting paper in the middle, comprising a roller body, characterized in that the middle of the roller body is thick, and the two ends are thin, forming two cones with bottom faces connected, and the taper angle of the cone is between 0.4- Between 0.5 degrees, the surface roughness is between Ra1.6-Ra0.8.

After the cutter 2 cuts the paper 1, the paper 1 winds around the middle and high roller 4. Since the middle and high roller is thick in the middle and thin at both ends, and has a certain taper, the paper 1 will be slightly separated to both sides at the cutting position under tension traction. There is a gap of 3-5 mm in the middle, and the paper will be separated in the middle after being wound on an air expansion shaft 5, so as not to overlap each other, and the two rolls of paper can be easily separated after cutting.

The above content is a further detailed description of the utility model patent in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the utility model patent is limited to the above descriptions. For those of ordinary skill in the technical field to which the utility model belongs, without departing from the patent concept of the utility model, some simple deduction or replacement can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (1)

1. A medium-high roller for cutting paper in the middle, comprising a roller body, characterized in that the middle of the roller body is thick, and the two ends are thin, forming two conical bodies with bottom faces connected, and the taper angle of the conical body is at Between 0.4-0.5 degrees, the surface roughness is between Ra1.6-Ra0.8.