Method for producing double-color and double-hardness sole through single-color injection machine table by using middle plate to separate colors

Abstract

The invention relates to a method for producing a double-color and double-hardness sole through a single-color injection machine table by using a middle plate to separate colors. The method comprises the following steps: (1) producing a one-color and one-hardness cold mold base in advance by using a TPR injection machine table through a mold of the cold mold base, and then preparing the single-color injection machine table, the cold mold base with one color and one hardness and an EVA injection mold; (2) placing the one-color cold mold base in a lower mold cavity of a lower mold; (3) placing a middle plate mold on the lower mold, and closing an upper mold; (4) injecting EVA with different colors in the upper mold by using the single-color injection machine table, and enabling a partially formed sole to be positioned between the upper mold and the middle plate mold; and (5) opening the molds, taking out the middle plate mold, then closing the molds, adding sulfur and heating, and enabling the cold mold base and the EVA material subjected to injection molding in the upper mold to be subjected to hot melting synthesis so as to form the sole with two different colors or different hardness. The method is high in popularity rate and can be used flexibly, capacity is improved, and the unit price of the mold and an EVA finished product is low; production efficiency is improved; and the problem of mixing of two colors is solved effectively.

Description

technical field [0001] The invention relates to footwear production technology, in particular to a method for producing two-color and double-hardness soles on a single-color injection machine that can be widely used in the production of shoe soles and sporting goods by using a middle plate to separate colors. Background technique [0002] EVA soles have high resilience, high tensile strength, high toughness, good shock resistance and cushioning performance, excellent heat insulation, heat preservation, cold protection and low temperature performance, can withstand severe cold and exposure, closed cells, good sound insulation effect, closed cell structure, no Good water absorption, moisture resistance, water resistance, corrosion resistance to sea water, oil, acid, alkali and other chemicals, antibacterial, non-toxic, tasteless, and pollution-free. [0003] EVA sole has good softness, rubber-like elasticity, good flexibility below 0°C, good transparency and surface gloss, goo...

AI Technical Summary

Problems solved by technology

[0005] First, use a two-color injection machine to do two-color (that is, the two colors are directly injected into the mold by the machine). The disadvantages of this technology are: ① The machine is expensive (about 1 million yuan for each eight-station two-color machine, and a single-color machine (only about RMB 500,000); ②The penetration rate is low, and the general factories only have monochrome machines, which cannot meet the mass production capacity; ③The production capacity is low, and only one mold can be installed in one station, (that is, two block mold); ④The unit price of the mold is more expensive than that of the single-color mold; ⑤The unit price of the EVA base is higher

[0006] Second, the mold is put into the vacuum machine to make two-color (that is, the two colors are made of cold mold products first, and then manually put into the mold). The disadvantages of this technology are: ①The popularity rate is not high, and it cannot meet mass production Production capacity; ②EVA finished products have a high defect rate; ③Can only do two-color, not single-color (that is, if there is no two-color order, it will cause a lot of idle machines to waste)

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