Punching and knurling forming device

Abstract

The invention discloses a punching and knurling forming device which is composed of a pin roller and a concave roller meshed with each other. The punching and knurling forming device is characterized in that punching pins composed of platforms and pyramids are arranged on the surface of the pin roller, the upper bottom surface of each platform is connected with at least one pyramid, the lower bottom surfaces of the platforms are connected with a core of the pin roller, the sum of the areas of the bottom surfaces of all the pyramids on one platform is smaller than the area of the upper bottom surface of each platform, and concave holes corresponding to the pyramids on the pin roller are formed in the surface of the concave roller. With the adoption of the punching and knurling forming device, bulges and pores can be formed on a non-woven fabric or a perforated film, and the bottoms of the bulges are continuous planes, therefore, an effective support effect can be achieved on the bulges, meanwhile, the contact area with a lower-layer flow guide layer or an absorber can be increased when an absorption product is processed, thus the bonding strength can be increased, and finally, the surface layer fall-off or displacement is seldom caused in use of the device.

Description

technical field [0001] The invention relates to a perforating and embossing forming die, in particular to a perforating and embossing forming die for non-woven fabrics and perforated films. Background technique [0002] Non-woven fabrics and perforated films have been widely used in the surface layer of sanitary napkins, sanitary pads and baby diapers. In order to improve the comfort of the surface layer in contact with the skin, effectively reduce the contact area with the wearer's skin and increase the penetration rate of body fluids , to reduce the sense of moisture stickiness, therefore, it is necessary to open holes on the surface layer to form infiltration channels and to form a concave-convex structure on the surface of the non-woven fabric and perforated film to reduce the contact area, thus appearing a perforated non-woven fabric with a concave-convex structure and perforated film. The surface layer is embossed and pore-opened on the surface in contact with the wea...

AI Technical Summary

Problems solved by technology

Chinese Patent Publication No. CN103908376A, published on July 9, 2014, the name of the invention is a three-dimensional non-woven fabric with an open-pore structure, the application discloses a three-dimensional non-woven fabric with an open-pore structure, mainly It uses a pair of heated concave-convex rollers to emboss and punch non-woven fabrics in one step to form a concave-convex structure. The fiber density in the raised area increases, destroying the fluffy and soft performance of the non-woven fabric, and only relying on the high-density fibers at the side edges of the raised area for support, it is difficult to maintain the 3D effect of the three-dimensional non-woven fabric under a certain pressure. And when the finished product is made, only the bottom edge of the raised area is on the same plane as the concave area, so when it is bonded with the flow guide layer or the absorbing layer, it is not easy to bond due to the small bonding area. It is easy to fall off and shift, which will affect the absorption effect

Images