Double plank vegetable fibre tray integral pressing method and special mould thereof

Abstract

The invention discloses a double plank vegetable fibre tray as well as an integral pressing method and a special mould thereof. The special mould comprises a female mould, an upper punch, a lower punch, a core rod movably connected with the lower punch, and a power device, wherein the female mould comprises a frame and a spacing mould; the spacing mould extends into the middle of a frame cavity to divide the frame cavity into an upper plank die cavity, a lower plank die cavity and at least two supporting leg die cavities arranged between an upper plank and a lower plank; the lower punch comprises a lower punch A and a lower punch B; the punch head of the lower punch A axially moves in the lower plank die cavity of the female mould; and the punch head of the lower punch B axially moves in a die cavity hole of the lower punch A. The pressing method comprises the steps that: first, the upper plank is pressed by the upper punch; then the lower plank is pressed by the lower punch A; and supporting legs are pressed through the coordination of the lower punch B and the core rod. The invention has the advantages of even pressing, small damage ratio, large bearing force of finished products and low cost.

Description

Technical field: [0001] The invention relates to plant fiber pressed products, in particular to special equipment for pressing trays with plant fibers and a pressing method thereof. Background technique: [0002] At present, in the process of cargo storage, stacking and transportation, pallets have become one of the main tools. Among them, the plant fiber (including crop straw) trays are favored by the market because they can be recycled and reused, and the recovery rate can reach 100%. At the same time, they have the advantages of low cost, low pollution, and no fumigation treatment. However, due to the poor fluidity of the raw materials and the particularity of the large volume change during the molding process, the plant fiber tray adopts a general conceptual molding process such as a one-way molding process, and there is generally uneven compaction density, especially the gap between the support feet and the plate. The joint is even the weak link. It is difficult to for...

AI Technical Summary

Problems solved by technology

However, the patent submitted by the inventor only solved the problem of the production of plant fiber trays with discs on the top and split support feet below. For trays with special shapes, such as one-piece support legs at the bottom of the disc Or pallets with supporting feet arranged between the upper and lower plates, or reinforced ribs in the supporting foot cavity, it is still difficult to produce qualified products with existing technical solutions

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