Forming method and equipment for absorption core

Abstract

The invention discloses a forming method and equipment for an absorption core. The method comprises the following steps: arranging a forming region and a demolding region on the peripheral surface of a forming drum, and enabling each forming assembly installed on the forming drum to independently rotate relative to a mandrel of the forming drum; after the forming assemblies enter the forming region, allowing the adjacent forming assemblies to be tightly connected, and forming the absorption core; and after the forming assemblies retreat from the forming region, allowing the forming assemblies to rotate in an accelerated mode, separating the adjacent forming assemblies, and demolding and transferring the absorption core. The equipment comprises the forming drum and a plurality of the forming assemblies mounted on the forming drum, wherein each forming assembly independently rotates relative to the mandrel of the forming drum; and the forming region and the demolding region are arranged on the peripheral face of the forming drum, and the rotating speed of each forming assembly in the forming region is smaller than the rotating speed of each forming assembly in the demolding region. The forming density of the absorption core and the uniformity of the content of a high polymer material can be effectively improved, and then the forming quality of a product is improved.

Description

technical field [0001] The present invention relates to the technical field of manufacturing disposable sanitary products, in particular to a method and equipment for forming an absorbent core. Background technique [0002] As known disposable absorbent products, such as adult diapers, baby diapers, etc., have been widely used in society. With the intensification of the aging of the population structure, the demand for adult diapers (adult incontinence) products will increase further. In such disposable sanitary products, the core structure is an absorbent core, that is, the molding quality of the absorbent core has the greatest impact on the performance of the product. For the absorbent core, the currently commonly used molding methods are basically implemented as follows: [0003] Taking adult diapers as an example, in order to improve its absorption performance, such as figure 1 or figure 2 As shown, the absorbent core is generally composed of upper and lower cores. ...

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Problems solved by technology

[0005] For the molding of the lower core, its fibers and polymer materials are also fed in a continuous delivery mode, but on the forming drum, the mold cavities 3 for molding in two adjacent forming tire molds are not continuous (such as Figure 4 shown), so during the molding process, with the rotation of the drum body, the negative pressure adsorption area on the peripheral surface of the molding area is always changing. In this case, the fibers and polymer materials cannot be uniformly gathered and formed, and Excessive accumulation will occur at both ends of each cavity, which will eventually affect the molding effect, that is, Figure 5 As shown, when the mold cavity of the tire mold is discontinuous, the mixture of fibers and polymer materials in the discontinuous area will gather toward the ends of the two adjacent mold cavities (such as Figure 5 Indicated by the arrow in ), taking adult diapers as an example, during the molding process, the cavity distance between the adjacent molding tire molds of the upper core body is not less than 200mm, so there will be serious end aggregation during molding ,like Figure 5 As shown by the arrows in , the fibers and polymer materials in the interval area will be drawn by the airflow of the two adjacent mold cavities, and gather along the nearest area (that is, the end of the mold cavity), resulting in the molding of the end of the mold cavity The density and the content of polymer materials are higher than other areas, and the formed absorbent core will affect the use effect of the product

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