TW201414435A - Integrally molded manufacturing method of dual hardness foamed soles - Google Patents

Abstract

The present invention discloses an integrally molded manufacturing method of dual hardness foamed soles, comprising the steps of: jarring, sheet-extruding, and cutting a first and a second blanks into a first and a second prototype shaped objects, where the first blank has a hardness greater than that of the second blank; putting the first prototype shaped object into a pattern shoe body mold and subjecting to an initial compression to obtain a first molded object; putting the second prototype shaped object into a plane mold and subjecting to an initial compression to obtain a second molded object; removing the second molded object from the plane mold and placing at a predetermined position corresponding to the first molded object; placing the first and second molded objects in a mold; closing the mold and foaming and vulcanizing the first and second molded objects in the mold for a suitable temperature and time; afterwards, opening the mold and taking out the integrally molded object of a predetermined shape including the first and the second molded objects.

Description

One-body molding manufacturing method for double-hardness foaming sole

The invention relates to a foamed sole, in particular to a method for manufacturing a double-stiffness foam sole.

The conventional sole and the midsole are respectively produced by the two individuals 10', 20' (as shown in Figure 1 and Figure 4), and the adhesive (such as super glue) 30' is required to be manually (see Figure 2. 3 and 5) applied to the contact surface of the sole 10' and the midsole 20', and subjected to gravity pressurization by a press machine, so that the sole and the midsole are mutually connected, and then excess flows out to the sole 10' And the adhesive (super glue) 30' outside the contact surface of the midsole 20' is scraped off, and waits for the adhesive (super glue) 30' to exert the bonding effect, then the shoe sole and the midsole are processed. 2. Figure 3 and Figure 5).

However, since the above process must complete the product by injection, smoothing, sizing, pressing, then scraping, and waiting, the manufacturing process is so cumbersome that it takes six to seven procedures to complete. More mass production reduces its cost.

Based on the above problems, the inventors have proposed a method of manufacturing a double-stiffness foamed sole to overcome the drawbacks of the prior art.

The object of the present invention is to provide a method for manufacturing a foamed sole having a double hardness by adding a blank of different hardness to a mold.

In order to achieve the above object, the present invention provides a method for manufacturing a double hardness foamed sole, the method comprising: rolling a first blank and a second blank separately, cutting out, and cutting into a first a preliminary shape shape and a second preliminary shape shape, wherein The hardness of the first blank is higher than the hardness of the second blank; the first initial shape is placed in a pattern shoe mold, and is initially pressed into a first molding; the second initial shape is Putting into a flat mold to be initially pressed into a second molded product; taking out the second molded product from the flat mold and placing it at a predetermined position corresponding to the first molded product; the first molded product and the second molded product The molded article is simultaneously placed in a mold; and the mold is covered and subjected to foaming and vulcanization of the first molded product and the second molded product in the mold at a suitable temperature and for a suitable time; After the foaming and vulcanization, the mold is opened and an integral molded article having a predetermined shape of the first molded article and the second molded article is taken out.

In some embodiments, the first billet has 100 parts by weight of a first rubber material, the second billet has 100 parts by weight of a second rubber material, and the first billet and the second billet Each has at least a filler, stearic acid, zinc oxide powder, an antioxidant, a vulcanizing agent, a softening agent, a conditioning agent, an accelerator, and a coloring agent, wherein the filler has at least 30 parts by weight.

In certain embodiments, the first blank has the same composition or has a different composition than the second blank.

In certain embodiments, the filler content of the first blank is higher than the filler content of the second blank.

In certain embodiments, the foaming agent content of the first billet is lower than the foaming agent content of the second billet.

In some embodiments, the manufacturing method further comprises separately recovering the undercut produced by cutting the first blank and the second blank, repeating rolling, stripping, and cutting into The step of the first preliminary shape and the second preliminary shape.

In some embodiments, the predetermined location is above the first molding.

In some embodiments, the first molding has at least one space that is the at least one space.

In some embodiments, the first blank is made of SBR (styrene-butadiene rubber), BR (Butadiene rubber) or NR (Natural Rubber) material. .

In certain embodiments, the first shaped article is a green compact.

While the invention has been described in terms of several preferred embodiments, the preferred embodiments of the present invention It is not intended that the invention be limited to the following drawings and embodiments.

Referring to FIG. 6 to FIG. 11 , FIG. 6 is a schematic perspective view showing a double-hardness foam sole of the present invention, and FIG. 7 is a cross-sectional view showing a first embodiment of the double-hardness foam sole of the present invention, and FIG. 8 is a schematic view. 2 is a schematic cross-sectional view showing a second embodiment of the double-hardness foamed sole of the present invention, FIG. 9 is a perspective view showing a third embodiment of the double-hardness foamed sole of the present invention, and FIG. 10 is a view showing the double-stitched foam sole of the present invention. 3 is a schematic cross-sectional view, and FIG. 11 is a flow chart showing a method of manufacturing a double-hardness foam sole of the present invention.

The method for manufacturing a double hardness foaming sole of the present invention (as shown in FIG. 11) comprises the following steps: Step S1: rolling a first blank and a second blank separately, cutting, and cutting into a first initial shape and a second initial shape, wherein the first blank has a high hardness The hardness of the second blank; step S2: placing the first initial shape into a pattern shoe mold, initially pressing into a first molding; step S3: placing the second initial shape into a flat mold Initially pressing into a second molding; step S4: taking out the second molding from the planar mold and placing it at a predetermined position corresponding to the first molding; step S5: simultaneously molding the first molding and the second molding Putting in a mold; step S6: covering the mold and subjecting the first molding and the second molding in the mold to foaming and vulcanizing at a suitable temperature and for a suitable time; and step S7: completing the foaming And after vulcanization, the mold is opened and a one-piece molded article having a predetermined shape of the first molded article and the second molded article (i.e., the integrally formed foamed sole 1) is taken out.

Wherein the first blank has 100 parts by weight of a first rubber raw material, the second blank has 100 parts by weight of a second rubber raw material, and the first blank and the second blank respectively have at least a filler, stearic acid , a zinc oxide powder, an antioxidant, a vulcanizing agent, a softening agent, a foaming agent, a foaming auxiliary, a conditioning agent, an accelerator, a coloring agent, wherein the filler has at least 30 parts by weight, and the first first material and the first The composition of the two blanks is shown in Table 1 below, which is a preferred embodiment, but is not limited thereto.

Furthermore, the manufacturing method of the present invention may further comprise separately recovering the undercuts generated after the first blank and the second blank are cut (step S8), repeating the rolling, peeling, and cutting of the step S1. The first initial shape and the second original shape are cut.

The first billet and the second billet may have the same composition or may have different compositions; the filler content of the first billet may be higher than the filler content of the second billet; the foaming agent content of the first billet It may be lower than the blowing agent content of the second blank.

The predetermined position may be above the first molding (ie, the first blank) (as shown in FIG. 7 and FIG. 8); or the first molding has at least one space, the predetermined position may be at least one In the space, if it corresponds to the bottom of the hind foot and/or the bottom of the forefoot (as shown in Figures 9 and 10), but not limited to this.

In addition, the foamed sole 1 formed by the manufacturing method of the present invention can be integrally formed as shown in FIG. 6 and FIG. 7, but has different hardness, that is, the second portion 20 is a low-hardness structure. A portion 10 is a high-hardness structure; or a foamed sole 1 can be as shown in FIGS. 9 and 10, the first portion 10 is a high-hardness structure, and the second portion 20 is a low-hardness structure in the first portion 10.

Furthermore, when the lower portion 10 is to be made into a wear-resistant outsole (as shown in FIG. 8), the composition thereof may be as shown in the following Table 2, but is not limited thereto.

The adjustment of the specific gravity is related to the filling amount of the filler and the material. The larger the filling amount is, the higher the specific gravity is, and the smaller the filling amount is, the lower the specific gravity is. The adjustment of the hardness is also directly related to the type and amount of the filler. relationship.

Therefore, by the above manufacturing method, a structure having both double hardnesses in a single foamed sole can be realized, including a low-hardness structure and a high-hardness structure, and the bonding and the adhesion are reduced as compared with the conventional method. The step of scraping further shortens the process time and reduces the environmental and labor costs of using adhesives.

Although the present invention has been explained in connection with the preferred embodiments, it is not intended to limit the invention. It should be noted that many other similar embodiments can be constructed in accordance with the teachings of the present invention, which are within the scope of the present invention.

[this invention]

1‧‧‧Foam sole

10‧‧‧Part 1

20‧‧‧Part II

Steps S1 to S8‧‧‧ steps according to the manufacturing method of the present invention

[知知]

10’‧‧‧ sole

20’‧‧‧ midsole

30'‧‧‧Binder

Figure 1 is a schematic exploded view showing a conventional foamed sole.

Figure 2 is a schematic cross-sectional view showing a conventional foamed sole.

Figure 3 is a schematic cross-sectional view showing another embodiment of a conventional foamed sole.

Fig. 4 is a structural schematic view showing still another embodiment of a conventional foamed sole.

Figure 5 is a cross-sectional and partial enlarged view of Figure 4;

Figure 6 is a perspective view showing the double-hardness foam sole of the present invention.

Figure 7 is a cross-sectional view showing a first embodiment of the double-hardness foam sole of the present invention.

Figure 8 is a cross-sectional view showing a second embodiment of the double-hardness foam sole of the present invention.

Figure 9 is a perspective view showing a third embodiment of the double-hardness foam sole of the present invention.

Figure 10 is a cross-sectional view showing the third embodiment of the double-hardness foam sole of the present invention.

Figure 11 is a flow chart showing a method of manufacturing a double-hardness foamed sole of the present invention.

Steps S1 to S8‧‧‧ steps according to the manufacturing method of the present invention

Claims (10)

A method for manufacturing a double-hardness foaming sole, the method comprising the steps of: rolling a first blank and a second blank separately, and cutting the sheet into a first initial shape and a second initial a body shape, wherein a hardness of the first blank is higher than a hardness of the second blank; the first initial shape is placed in a patterned shoe mold, and is initially pressed into a first molded product; The second initial shape is firstly pressed into a second mold into a flat mold; the second molded product is taken out from the flat mold and placed at a predetermined position corresponding to the first molded product; Forming the second molded product and the second molded product simultaneously in a mold; covering the mold and foaming the first molded product and the second molded product in the mold at a suitable temperature and for a suitable time And vulcanization; and after the foaming and vulcanization are completed, the mold is opened and an integral molded article having a predetermined shape of the first molded article and the second molded article is taken out. The manufacturing method according to claim 1, wherein the first blank has 100 parts by weight of a first rubber raw material, and the second blank has 100 parts by weight of a second rubber raw material, and the first a blank and the second blank respectively have at least a filler, stearic acid, zinc oxide powder, an antioxidant, a vulcanizing agent, a softening agent, a adjusting agent, a promoter, and a coloring agent, wherein the filler has at least 30 parts by weight. . The manufacturing method according to claim 1, wherein the first blank and the second blank have the same composition or have different compositions. The manufacturing method according to claim 2, wherein the filler content of the first blank is higher than the filler content of the second blank. The manufacturing method according to claim 2, wherein the foaming agent content of the first billet is lower than the foaming agent content of the second billet. According to the manufacturing method of claim 1, the method further comprises: recovering the undercut produced by cutting the first blank and the second blank, respectively, repeating rolling, stripping, and cutting into The step of the first preliminary shape and the second preliminary shape. The manufacturing method according to claim 1, wherein the predetermined position is above the first molded article. The manufacturing method according to claim 1, wherein the first molding has at least one space, and the predetermined position is the at least one space. The manufacturing method according to claim 1, wherein the first billet is SBR (styrene-butadiene rubber), BR (Butadiene rubber) or NR (natural rubber) , Natural Rubber) made of materials. The manufacturing method according to claim 1, wherein the first molded product is a green molded product.