Vulcanization molding method for rubber sole

Abstract

The invention relates to a vulcanization molding method for a rubber sole. The method is characterized by including the following steps of: (1). conducting quantitative ejection, firstly calculating the volume amount of rubber consumed for making a sole product, leading the volume amount of rubber material into an ejection machine in advance to conduct ejection molding, thus obtaining a blank with a precise volume amount and a temperature reaching a first molding temperature; (2) placing a hot blank, taking out the high temperature state blank and quickly putting into a shoe mould; (3) carrying out molding in the mould, closing the shoe mould and performing heating and pressurizing, molding the blank into a first sole according to the mould cavity shape, meanwhile raising the first molding temperature to a second molding temperature during heating of the blank so as to achieve vulcanization molding of the rubber sole; and (4) taking out the finished product.

Description

technical field [0001] The invention relates to a molding method for shoe soles, in particular to a vulcanization molding method for rubber shoe soles which can reduce finished product flash waste and effectively reduce production costs. Background technique [0002] In order to have good cushioning performance, general soles are usually made of rubber materials, and the production process of general rubber soles is as follows: figure 1 As shown, the first is (1). Cut the material block, first cut the rubber material block into a block-shaped blank of appropriate size, and then (2). Place the cold blank, and cut the above-mentioned blank Put it into the mold cavity of a shoe mold, then (3). Molding, close the shoe mold and perform hot pressing operation on the shoe mold. After the blank in the shoe mold is heated, the material will soften and have good fluidity. In this way, the raw material will form a shoe sole according to the shape of the cavity of the shoe mold. When t...

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Problems solved by technology

[0003] Although the above-mentioned process is a common production method for general rubber soles, there are still many deficiencies in the implementation of this process that need to be improved. In the general sole process, the rubber material is mainly obtained by cutting the rubber block first. A blank. However, when the rubber block is being cut, it is usually impossible to accurately control its volume. In order to avoid the volume of the blank after cutting is too small, resulting in insufficient material in the subsequent process, Therefore, most of the blanks will be cut into larger volumes, so as to ensure that the blanks can be formed into a complete shape of the sole when they are molded in the shoe mold. Many, in the molding process, excess material can overflow at the edge of finished product 100 and form quite wide and thick burrs 101 (see also figure 2 ), to repair this large amount of burrs 101 will not only consume manpower and man-hours, more importantly, it will cause a waste of rubber raw material cost, because the burrs 101 after molding have been vulcanized and cannot be recycled, and a large amount of burrs waste is likely to cause environmental protection. problem, and it increases the difficulty of waste disposal. Moreover, the general shoe sole manufacturing process is to produce cold blanks by cold processing and cutting. Before the cold blanks are placed in the shoe mold, the material temperature is usually at room temperature. When it is put into the shoe mold for hot pressing, the heating temperature of the shoe mold will directly rise from the normal room temperature (20-30°C) to the vulcanization temperature (about 80°C). However, the rubber itself is not a heat-conducting material. To raise the cold blank material from room temperature to the vulcanization temperature, the heating process takes a long time. Therefore, the molding operation time of the general shoe sole manufacturing process is long, resulting in the inability to effectively increase the production capacity. Moreover, the longer the heating time of the molding machine, the lower the energy consumption. The greater the loss is, the loss of equipment and energy is quite serious, and the production cost of the sole will also increase. In addition, when the blank enters the molding stage, the shoe mold will heat the blank. As far as the material is concerned, the temperature conducts heat from the outside to the inside, which causes the internal material of the blank to have a difference in temperature between external heat and internal cooling. This temperature difference will cause the vulcanization degree of each part of the internal structure of the blank to be different, and finally formed The finished soles are prone to uneven texture

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