CN-121988545-A - Pulp sheet stain detection and removal device and detection and removal method

Abstract

The invention relates to a pulp sheet stain detection and removal device and a detection and removal method. The device comprises a conveying mechanism, an image acquisition device, a punching device and a punching device, wherein the conveying mechanism is used for conveying a pulp sheet, the image acquisition device is arranged on a conveying path of the conveying mechanism and respectively performs image acquisition on the upper surface and the lower surface of the pulp sheet, the punching device is arranged on the conveying path of the conveying mechanism and positioned at the downstream of the image acquisition device, the device comprises a balance wheel conveyor and the punching mechanism, the balance wheel conveyor comprises a conveying platform and a plurality of balance wheel assemblies uniformly distributed on the conveying platform, punching holes are formed in the conveying platform, the punching mechanism is positioned above the punching holes, and the punching heads of the punching mechanism are matched with the punching holes. The automatic detection device has the advantages of high detection and removal precision, high automation degree and no damage to the pulp board caused by stain removal.

Inventors

• YANG SHUAIFENG
• YANG ZIQIANG

Assignees

• 河南逸祥卫生科技有限公司

Dates

Publication Date

20260508

Application Date

20260306

Claims (10)

1. 1. Pulp sheet stain detection remove device, its characterized in that includes: The conveying mechanism is used for conveying the pulp board; The image acquisition device is arranged on a conveying path of the conveying mechanism and is used for respectively acquiring images of the upper surface and the lower surface of the pulp board; The stamping device is arranged on a conveying path of the conveying mechanism and positioned at the downstream of the image acquisition device, and comprises a balance wheel conveyor and a stamping mechanism, wherein the balance wheel conveyor comprises a conveying platform and a plurality of balance wheel assemblies uniformly distributed on the conveying platform, punching holes are formed in the conveying platform, and the stamping mechanism is positioned above the punching holes and is matched with the punching holes.
2. 2. The pulp sheet stain detection and removal device of claim 1, wherein the conveying platform is provided with an auxiliary positioning mechanism for positioning the pulp sheet, the auxiliary positioning mechanism comprising a plurality of vacuum chucks uniformly distributed on the conveying platform, each vacuum chuck being independently controllable.
3. 3. The pulp sheet stain detection and removal device of claim 1, wherein the conveying platform is provided with an auxiliary positioning mechanism for positioning the pulp sheet, the auxiliary positioning mechanism comprises a plurality of lifting stop rods uniformly distributed on the conveying platform, and each lifting stop rod can be independently controlled.
4. 4. The pulp sheet stain detection and removal device of claim 1, wherein a balance wheel sorter is provided between the image acquisition device and the stamping device, the balance wheel sorter having an acceptable product outlet and an unacceptable product outlet, the unacceptable product outlet being in butt joint with the stamping device.
5. 5. The pulp sheet stain detection and removal device of claim 1, wherein an air blowing device is provided upstream of the image acquisition device, and the air blowing device blows air to the upper and lower surfaces of the pulp sheet respectively to blow away dust and floating hair.
6. 6. The pulp sheet stain removal device of claim 5, wherein the blowing nozzle of the blowing device is disposed obliquely and blows in a direction opposite to the direction of pulp sheet conveyance.
7. 7. The pulp sheet stain detection and removal device of claim 1, wherein the image acquisition device employs a line camera.
8. 8. A detection and removal method using the pulp sheet stain detection and removal device according to any one of claims 1 to 7, characterized by comprising the steps of: s10, conveying the slurry plate through a conveying mechanism; S20, spot image acquisition, wherein the image acquisition device respectively acquires images of the upper surface and the lower surface of the passing slurry plate, identifies the spot position and forms spot coordinates; S30, removing the stains, after the slurry plate is conveyed to a conveying platform, controlling the balance wheel assembly to operate according to the determined stain coordinates to adjust the position of the slurry plate, enabling the stains to be between the punch and the punched hole, starting the punch to punch and remove the stains, and repeating the steps until the removal of all the stains on the slurry plate is completed.
9. 9. The inspection removal method of claim 8, wherein the pulp sheet is positioned in an assisted manner by controlling a corresponding positioning assistance mechanism when the position of the pulp sheet is adjusted according to the coordinates of the stain.
10. 10. The method of claim 8, wherein in the process of identifying the position of the spot and forming the coordinates of the spot, the length and width of the slurry plate are uniformly divided into n units to form n-n grid areas, and the corner point of one side of the slurry plate passing through the image acquisition device is taken as the origin of coordinates, so that the coordinate value of the spot is obtained.

Description

Pulp sheet stain detection and removal device and detection and removal method Technical Field The invention relates to a pulp sheet stain detection and removal device and a detection and removal method. Background In the production process of disposable sanitary products (paper diapers, sanitary napkins, pull-up pants and the like), a pulp board (a fluff pulp board is used as a core raw material of an absorption core body, and the surface cleanliness of the pulp board directly determines the water absorption performance, the use comfort and the safety of a final product. In the links of pulping, forming, drying, coiling, transporting and the like, the pulp board is easy to introduce various stains, mainly comprises sticky stains (glue spots, hot melt adhesive residues), non-sticky stains (heterochromatic fibers, wood dust miscellaneous residues, dust clusters) and intractable mixed stains (large-area greasy dirt, thick glue blocks, miscellaneous residue mixtures and the like), if the stains are not detected and removed in time, the problems of caking, uneven water-absorbent resin wrapping and the like in the subsequent fluff pulp crushing process can be caused, and further the quality defects of back seepage, side leakage, breakage and the like of a sanitary article core body are caused, and even the appearance and the use experience of products are possibly influenced due to heterochromatic stains and impurity residues, so that the quality control standard of the sanitary industry is not met. The prior art is characterized in that the step of removing the pulp sheet stain comprises manual removal by manual naked eye observation, high-pressure air blowing, circular knife rolling and cutting and the like, the labor intensity of the manual mode is high, the detection efficiency is low, the detection precision is low, omission and false detection are easy, the high-pressure air blowing mode can only remove non-sticky tiny stains on the surface of the pulp sheet, the method is completely ineffective on sticky and intractable stains, the pulp sheet is easy to blow through the high-pressure air and float the surface of the pulp sheet due to the fact that the surface of the pulp sheet is softer, the pulp sheet is damaged and secondary pollution is caused, the circular knife rolling and cutting mode can cause raw material waste, and in the cutting process, pulp sheet fiber at a cut is loose due to friction, the cut is fluffed and damaged, and secondary pollution is caused. Disclosure of Invention The invention aims to provide a pulp sheet stain detection and removal device and a detection and removal method, wherein the detection and removal device has high detection and removal precision and high automation degree, and the stain removal cannot damage a pulp sheet. The technical scheme of the pulp sheet stain detection and removal device is as follows: The conveying mechanism is used for conveying the pulp board; The image acquisition device is arranged on a conveying path of the conveying mechanism and is used for respectively acquiring images of the upper surface and the lower surface of the pulp board; Stamping device installs on conveying mechanism's conveying path and is located image acquisition device low reaches, including balance conveyer and stamping mechanism, balance conveyer includes conveying platform and a plurality of equipartition balance subassembly on conveying platform, is equipped with the punching a hole on the conveying platform, stamping mechanism is located the punch a hole top and stamping mechanism's drift and the looks adaptation that punches a hole, wherein, balance conveyer can realize the multidirectional regulation to thick liquid board position, ensures that the position that the stain on the thick liquid board can aim at the punching a hole in proper order. On the basis of the scheme, the auxiliary positioning mechanism is arranged on the conveying platform and used for positioning the pulp sheet, and comprises a plurality of vacuum sucking discs uniformly distributed on the conveying platform, and each vacuum sucking disc can be independently controlled. The auxiliary positioning mechanism can improve the positioning precision of the pulp board on one hand, and can prevent the pulp board from moving in the stamping process and improve the precision of stain removal on the other hand. On the basis of the scheme, the automatic pulp feeding device is further improved in that the conveying platform is provided with an auxiliary positioning mechanism for positioning the pulp sheet, the auxiliary positioning mechanism comprises a plurality of lifting stop rods uniformly distributed on the conveying platform, and each lifting stop rod can be independently controlled. On the basis of the scheme, the balance wheel sorting machine is arranged between the image acquisition device and the stamping device, and is provided with a qualified product outlet and a unqualified product outlet, and t