Method for preparing special pulp moulding plate with convex part and mould

Abstract

The invention discloses a method for preparing a special pulp moulding plate with a convex part and a mould. The preparation method is characterized in that the water squeezing moulding on the convex part of the special (non-flat) pulp moulding plate adopts a flexible mould method; the mould used is characterized in that: the mould is provided with a cavity according to the shape of the convex part of the special (non-flat) pulp moulding plate, and the center of the cavity is provided with a flexible punch device which has the minimum initial volume and applies pressure on peripheral pulp or paper fibers when the volume is expanded; the prepared pulp moulding plate is characterized in that: the plate has a non-flat and special shape, and is provided with at least one convex part; the ratio of the height of the convex part to the minimum caliber of the convex part is more than 0.3; and the weight per unit area of the plate is more than 0.30 gram per square centimeter, and the density of the plate is more than 0.6 gram per square centimeter. The method enables the manufacture of super-thick and high-density special pulp moulding products to be possible, simplifies process and reduces cost; and the products have good comprehensive usability. The special pulp moulding plate can be widely used in the fields such as industrial packaging, storage and transportation, buildings, decoration, office equipment and products and the like, and has great market potential.

Description

technical field [0001] The invention relates to a preparation method and a mold for a pulp molded board, in particular to a preparation method for a special-shaped pulp molded board with a raised part and the mold used therefor. Background technique [0002] Using waste paper as a raw material to make various boards, used as industrial packaging, storage and transportation materials, building decoration materials, etc., has good economic and social benefits, as described in the inventor's invention patent "Pulp Method for the preparation of molded panels and the molds used therein. But the technology disclosed in this patent is not suitable for the making of the special-shaped pulp molded sheet material with convex part: when the ratio of the height of the convex part to the minimum diameter of the convex part is large (such as greater than 0.3), the surface of the male mold and the concave mold The parallel motion component of the relative motion between the male and femal...

AI Technical Summary

Problems solved by technology

But the technology disclosed in this patent is not suitable for the making of the special-shaped pulp molded sheet material with convex part: when the ratio of the height of the convex part to the minimum diameter of the convex part is large (such as greater than 0.3), the surface of the male mold and the concave mold The parallel motion component of the relative motion between the male and female dies will cause the paper fiber laminate between the male and female dies to be broken, resulting in uneven wall thickness of the raised part and longitudinal and transverse fractures

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