Description:

Pulp molding and molds

Moreover, the molding of pulp molded products is very different from the rubber and plastic products molded in the mold cavity. The slurry used when molding pulp molded products is an aqueous solution containing only about 10% of fibers. It is necessary to ensure that most of the Water runs off, so the mold for forming pulp molded products must be a mesh mold.

Introduction:

The shaping mold is a mold with heating, pressure and dehydration functions that directly enters the wet paper blank after it is formed. The products made with the shaping mold have smooth surfaces, accurate dimensions, solidity and good rigidity. Disposable tableware are all made using this mold. In industrial packaging, some small, precise, and large-quantity items are packaged in a stacked manner. Each layer is used to package and position the packaging products. If pulp molded products are used, a shaping mold is required. to manufacture.

General industrial packaging products are processed on one side and do not require heat setting, and can be dried directly. The shaping mold structure includes a convex mold, a concave mold, a mesh mold and a heating element. There are drainage and exhaust holes on the convex or concave mold attached to the mesh mold. During operation, the wet paper blank is first squeezed in the shaping mold, with 20% of the The water is squeezed out. At this time, the water content in the wet paper base is 50-55%. After the wet paper base is heated in the mold, the remaining water is vaporized and eliminated. The wet paper base is pressed, dried and shaped to form a product.

The mesh mold in the shaping mold will cause mesh marks on the surface of the product, and the mesh mold will be damaged quickly during frequent extrusion. In order to solve this problem, a mold designer designed a meshless mold, which is manufactured using copper-based spherical powder metallurgy. In the past two years, after many structural improvements and the selection of appropriate powder particle sizes, the life of the meshless shaping mold produced is 10 times that of the mesh mold, and the cost is reduced by 50%. The manufactured paper products have high precision and smooth inner and outer surfaces.