CN1075912A - A kind of manufacturing method of shoe midsole - Google Patents

Abstract

The present invention relates to a method for making insole of shoes, and is characterized by that the cut rubber plate is made up by using EVA rubber particles, foaming agent and bridging filler through the processes of mixing, stirring, heating and rolling-extruding under the condition of no foaming, then cutting and forming, then placing it in the mould of forming machine, heating and foaming to obtain the invented product. The method can recover the cut unfoamed rubber material, and then the unfoamed rubber material is processed into the rubber plate for reuse, so that the material is fully utilized, the shoe insole is low in price, the pollution caused by burning and burying materials is eliminated, and the environmental protection problem existing for many years is solved.

Description

The invention relates to a method for manufacturing a shoe midsole.

The midsole of existing sports shoes or leisure soles is mainly made of foamed rubber. Bridge filler and other raw materials are mixed and stirred, heated and foamed by a roller press to form a fully foamed or not fully foamed rubber sheet (controlled by the proportion of foaming agent, heating time and temperature to make it fully foamed or not fully foamed) Fully foamed body, generally so-called non-full foamed, is about 70-80% foamed state.); 2) Divide the fully foamed or not fully foamed rubber sheet into two halves longitudinally obliquely (see figure 2); 3) The cut rubber sheet is punched into a prototype of the sole by a punching machine (see Figure 3); 4) The prototype of the fully foamed sole is ground and polished according to the customized shape, and the finished product is a simple shape The midsole of the shoe (see Figure 4 (A)); 5) The incompletely foamed sole is first trimmed and shaped according to the groove, and then the semi-finished product is put into the embossing mold of the molding machine and heated for secondary foaming, Embossing and molding can make exquisite shoe midsoles (see Figure 4 (B)); a large amount of waste left after punching the soles of this manufacturing method cannot be recycled and reprocessed because they have been foamed, and can only be used as waste. Therefore make the cost of sole improve, and the waste of material is big, and the processing of this kind of discarded foam, easily pollutes air as with incineration, and then is not easy to corrupt as with burying, and causes very serious environmental protection problem.

The purpose of the present invention is to create a new manufacturing method for shoe midsoles with high material utilization rate, so as to reduce the waste of a large amount of materials, reduce the cost of shoe midsoles, solve serious environmental protection problems for many years, and improve environmental protection.

The manufacturing method of the shoe midsole of the present invention is as follows (see Figure 5): 1) Mix and stir the EVA rubber particles, foaming agent, and bridging filler in a predetermined proportion first, heat and keep it rolling into a rubber sheet without foaming ;2) The rubber sheet is cut out one by one by the punching machine to the appropriate size of the sole plate; 3) The sole plate is placed in the midsole molding mold of the molding machine, and the whole body is fully formed with the selected heating temperature and heating time. Foamed or not fully foamed into a shoe midsole prototype (see Figure 6, 7); 4) After grinding the fully foamed shoe midsole prototype into a simple shape shoe midsole product (see Figure 7); or The unfoamed shoe midsole prototype is trimmed and edged to form a pre-shaped body, and then placed in the embossing molding mold of the molding machine, heated for secondary foaming, and cooled to make a finer shoe midsole product (see Figure 8); 5) Recycle the leftovers of the cut unfoamed rubber sheet and roll and extrude it into a rubber sheet for reuse.

The invention has the advantages of reducing waste of a large amount of materials, high material utilization rate, economy, low cost of shoe midsole, and avoiding burning and burying of a large amount of waste materials, thereby greatly improving environmental pollution.

The present invention is further described below to embodiment and accompanying drawing.

Description of drawings:

Fig. 1 is the flow chart of the existing shoe midsole method.

Fig. 2 is a schematic diagram of the cutting and segmentation of the foamed rubber board in the existing shoe midsole manufacturing method.

Fig. 3 is a schematic diagram of the blanking situation of the sole plate in the existing shoe midsole manufacturing method.

Fig. 4 is a schematic diagram of the finished product in the existing shoe midsole manufacturing method.

Fig. 5 is a flow chart of the manufacturing method of the shoe midsole of the present invention.

Fig. 6 is a schematic diagram of the foaming of the sole plate in the shoe midsole molding mold of the present invention.

Fig. 7 is a schematic view of the appearance of the shoe midsole prototype of the present invention.

Fig. 8 is a schematic diagram of a finished product made by the present invention.

Example 1: The shoe midsole of this example is prepared as follows: 1. First mix 92-94% of the EVA rubber particle mixture (which contains appropriate amount of IR, CAC03, VN3), 5-6% of foaming agent CAP, bridging The filler DCPO0.6～1.5% is mixed and stirred first, and the rolling machine is heated to about 100°C and the rolling cylinder is cooled to keep it rolled and extruded into a rubber sheet without foaming; 2. The cutting machine cuts the sole plates of appropriate size on the rubber sheet one by one; 3. Put the sole plate into the midsole molding mold of the molding machine. If the bottom surface of the mold is a slope, then cut according to the gap of the slope Cut the corresponding filling board in the space, and fill it in the space of the inclined plane, so as to make up for the lack of rubber, heat the molding machine, first heat it at 180 ℃ ~ 190 ℃ for 4 minutes, open the mold to ventilate and discharge air bubbles under reduced pressure, So that the rubber in the peptized state can be filled in the mold cavity according to its homogeneity, and the upper end of the rubber can be naturally formed into a horizontal plane, then the mold is closed and heated for 25 minutes, and then the upper cover of the midsole molding mold is opened (in case of outside air) , then it can be expanded and foamed to form a prototype of a fully foamed shoe midsole (see Figure 7); 4. According to the required shape, cut off the flash and rough edges and perform shape grinding to complete a simple shape shoe midsole product ( See (A) in Figure 8). If the mold is fine, it can also be directly expanded and foamed in the mold to form the finished shoe midsole; The rolling machine rolls it into the shape of the original rubber sheet for reuse.

Embodiment 2: The preparation method of this embodiment is: 1. Appropriately reduce the proportion of the foaming CAP composition in the above embodiment 1, make it mix and stir with EVA (colloidal particles) and bridging filler, and keep it at no foaming 2. Cut the soles of appropriate size from the rubber sheet one by one by the punching machine; 3. Put the soles into the midsole forming mold, and the forming machine uses 160 Heat at ℃～180℃ for 10～20 minutes to make it in the incompletely foamed state, open the upper cover of the midsole molding mold, and expand and foam in case of external air to form a midsole that is about 80% foamed (not fully foamed) 4. Remove the burr and grind it according to the shaped body, and then put it into the embossing mold of the molding machine at a temperature of 140 ° C ~ 150 ° C for 5 minutes for secondary foaming, cool for 10 minutes, open the mold and take out the pressure. 5. Recycle the unfoamed rubber sheet cut in process 2, and use a rolling machine to roll and extrude it to form a rubber sheet , and can be reused to make the midsole.

Visible by above-mentioned two embodiments, the present invention not only makes full use of raw material because of the formation of no waste material, and has overcome the big problem of waste material polluting environment, and makes the price of making the end product of shoe greatly cheap.

Claims (3)

1, the manufacture method at the end in a kind of footwear, it comprises following operation:

1) will give certainty ratio EVA micelle, blowing agent, bridge formation earlier and fill out agent and mix and stir, and be rolled into an offset plate under the not foaming situation that remains on of heating;

2) by clicker press machine offset plate is cut down the suitably sole of size one by one;

3) sole is positioned in the mould of the middle end of make-up machine, to make fixed heating-up temperature and heat time heating time its full foaming or full foaming be end embryo in the footwear to select;

4) end embryo mill that will foam entirely in the footwear is repaiied the back and is become end finished product in the simple body footwear; The end embryo finishing edging that perhaps will not foam entirely in the footwear is and gives forming body, puts in the embossing mould of make-up machine then, adds the hotwork second time of foaming, makes end finished product in the meticulousr footwear through cooling;

5) cut into two exact halves that the surplus pin material that downcuts the offset plate that do not foam reclaims and edging is pressed into offset plate and re-uses.

2, press the manufacture method at the end in the described simple type body of claim 1 footwear, it is characterized in that filling out agent DCPO0.6～1.5% by EVA micelle compound 92～94%, blowing agent CAP5～6%, bridge formation in the operation 1 mixes stirring, roller press is heated 100 ℃, make its rolling extruding under not foaming situation be an offset plate; Heating-up temperature in the operation 3, be earlier with 180 ℃～190 ℃ heating 4 minutes heat time heating time, open mould then, treat that sizing material fills up die cavity, after the upper end forms horizontal plane naturally, again matched moulds was heated to 25 minutes again, opened the mould upper cover plate again, and making it meet outside air expanded foamed is embryo in the full foaming footwear.

3, by the manufacture method of the described embossing of claim 1 than the end in the exquisite footwear, the ratio that it is characterized in that the blowing agent CAP in the operation 1 suitably reduces, make-up machine was with 160 ℃～180 ℃ heating 10～20 minutes in the operation 3, be infull foamed state, open the mould upper cover plate later on, making it meet outside air expanded foamed is end embryo in the footwear that foam; The heating-up temperature of second time of foaming is 140 ℃～150 ℃ in its operation 5, and be 5 minutes heat time heating time.

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