Recovering and manufacturing process for polyurethane shoe materials and polyurethane-shoe-material injection-molding feeding mechanism for recovering and manufacturing process

Abstract

The invention discloses a recovering and manufacturing process for polyurethane shoe materials. The process includes the following steps that firstly, crushing is carried out, specifically, waste polyurethane shoe materials are poured into a strong crusher to be crushed; secondly, stirring is carried out, specifically, waste particle materials are poured into a low-speed heating stirrer, rosin powder and auxiliaries are added and stirred, and polyurethane injection molding materials can be obtained under the condition of stirring for 80-100 minutes at the stirring temperature of 100-110 DEG C; the weight of the rosin powder accounts for 0.8%-1.2% of the total weight, the auxiliaries are dioctyl phthalate, and the weight of the auxiliaries accounts for 1%-1.3% of the total weight; and thirdly, injection molding is carried out, specifically, the polyurethane injection molding materials are subjected to injection molding through a disc injection molding machine, so that the polyurethane shoe materials are obtained. Compared with the prior art, the waste polyurethane shoe materials are completely recycled, resources are effectively utilized, a large number of other auxiliary components are not needed, and the recovery cost is low; the process has the advantages that the recovery cost is low, and recovery products are soft. The invention further discloses a polyurethane-shoe-material injection-molding feeding mechanism used for achieving injection molding of polyurethane.

Description

technical field [0001] The invention relates to a manufacturing process, in particular to a recycling manufacturing process of polyurethane shoe material, and also relates to an injection molding feeding mechanism for polyurethane injection molding. Background technique [0002] Polyurethane (English: Polyurethane, abbreviated as PU) refers to a class of polymers containing urethane characteristic units in the main chain. It has been used in my country's shoemaking industry for more than 30 years. It is produced by the addition polymerization reaction of polyurethane and polyol in the presence of catalysts and other additives. The formed product has wear resistance, temperature resistance, sealing , sound insulation, good processing performance and other excellent properties, because the polyurethane raw material has a large fluidity and is in a liquid state, it cannot be directly injection molded, but can only be cast. [0003] Both the waste generated during the production...

AI Technical Summary

Problems solved by technology

However, this kind of recycling method, on the one hand, makes the recycling amount of polyurethane shoe material waste relatively limited, and the price of TPU is relatively expensive, resulting in high recycling costs; requirements

In view of the above two aspects, the existing polyurethane shoe material manufacturers generally do not recycle the polyurethane waste, and directly discard the polyurethane waste and pile it outside to let itself weather naturally, which undoubtedly causes a waste of resources

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