CN100411558C - Method for manufacturing shoe sole - Google Patents

Abstract

A method for manufacturing a sole comprises preparing a mold and an insert; the mould is provided with a mould cavity which is generally in the shape of a sole and at least one through hole, each through hole is communicated with the mould cavity and the outside, and the wall surface of the mould cavity is provided with a flat part at the periphery of each through hole; then, the insert is placed in the mold cavity of the mold, the through hole of the mold is vacuumized to enable the insert to be tightly attached to each flat part, then plastic raw materials are poured or injected into the mold cavity of the mold, and after the raw materials are solidified and formed, the mold and the raw materials are separated from each other to form the sole.

Description

How to make soles

technical field

The present invention relates to shoe soles, in particular to a manufacturing method for shoe soles.

Background technique

Commercially available air-cushioned shoes, because an airbag made of elastic material is embedded in the outsole of the shoe, it can greatly absorb the shock generated by the user during intense exercise, so the load on the user's ankle will also be reduced a lot , and thus reduce the possibility of sports injuries, and thus make air-cushioned shoes widely loved by consumers and become a mainstream product in the market.

Referring to Fig. 11 to Fig. 13, the manufacturing method of existing shoe sole is to prepare two first and second mold bases 81, 82 and an air bag 83 in order to form a sole 80 top, bottom surface earlier, and the first mold base 81 Two side plugs 811, 812 protrude from the inner side wall at the corresponding heels to define two hollow holes 84 on both sides of the sole 80, so that the body side of the airbag 83 is exposed. In production, the airbag 83 is first positioned in the first mold base 81, and placed between the two side plugs 811, 812, so that the end faces of the two side plugs 811, 812 are against the two opposite sides of the airbag 83: then , injecting an appropriate amount of polyurethane resin raw material PU to cover the surroundings of the airbag 83, and closing the first and second mold bases 81 and 82. In this way, two hollow holes 84 are formed on both sides of the finished shoe sole 80 , and the airbag 83 is exposed through the two hollow holes 84 and has the ability to deform, and the outsole 81 therefore has a more design sense.

The manufacturing technology of the above-mentioned shoe bottom material outsole is quite mature so far, but the airbags 83 are made of elastic material, so that the external dimensions of each airbag 83 are slightly different, so when different airbags 83 are located on the first When the mold base 81 is used, sometimes there will be a gap between the air bag 83 and each side plug 811, 812, so that the shoe sole will produce the overflow phenomenon commonly known as burr a during the above-mentioned manufacturing process. Therefore, the manufacturer must use chemical solvents for secondary Only one cleaning process can remove the burrs a that affect the appearance of the sole 80. In this way, the chemical solvent not only has the doubt of corroding the airbag 83, but also must spend extra manpower to remove the burrs a, which will greatly increase the production cost of the sole 80; , Chemical solvents are also harmful to human health after being inhaled into the human body.

Contents of the invention

The main purpose of the present invention is to provide a manufacturing method for shoe soles, which can maintain the integrity of the appearance of the finished product without secondary processing, greatly reduce the production cost, ensure the yield rate of the finished product, and further reduce the risk of inhalation of chemical agents by workers. the possibility of occupational injury.

In order to achieve the purpose of exposing before, the manufacturing method of shoe sole provided by the present invention includes the following steps: A, prepare a mold and an insert; the mold is provided with a mold cavity which is generally in the shape of a shoe sole and at least one through hole, and the through hole is Connecting the mold cavity and the outside world, the wall of the mold cavity has a flat portion on the periphery of each through hole; B, placing the insert in the mold cavity of the mold, making the insert close to the through hole; C, Vacuumize the through hole of the mould, so that the insert fits closely with each of the flats; D. Fill or inject plastic material into the mold cavity of the mould; and, E. After the raw material is solidified and formed, The mold and the raw material are separated from each other.

In order to describe the structure of the present invention in more detail, hereby cooperate with drawings to enumerate two preferred embodiment descriptions, wherein each diagram used is briefly described as follows:

Description of drawings

Fig. 1 is the structural representation of the first mold base and the second mold base of the mold that cooperates the first preferred embodiment of the present invention to adopt;

Fig. 2 is the top view of the first die holder in Fig. 1;

Fig. 3 is the schematic diagram of inserting the airbag in the first mold base in the method for manufacturing the first preferred embodiment of the present invention;

Fig. 4 is the schematic diagram of vacuumizing the air bag in the method of making of the first preferred embodiment of the present invention;

Fig. 5 is a schematic diagram of the air extraction equipment used in the first preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of pouring plastic raw materials into the first mold base in the method of the first preferred embodiment of the present invention;

Fig. 7 is a schematic diagram of mold clamping of the first mold base and the second mold base in the manufacturing method of the first preferred embodiment of the present invention;

Fig. 8 is a three-dimensional view of the outsole of the obtained shoe material after the seventh step in the manufacturing method of the first preferred embodiment of the present invention;

Fig. 9 is the implementation schematic diagram of the preparation method of the second preferred embodiment of the present invention;

Fig. 10 is a schematic diagram of the outsole of the shoe material obtained in the second preferred embodiment of the present invention;

Fig. 11 is a schematic diagram of the structure of the upper and lower mold bases adopted in the existing manufacturing method;

Fig. 12 is the schematic diagram of inserting an air bag in the lower mold base in the existing manufacturing method;

Fig. 13 is a schematic diagram of the outsole of the air-cushioned shoes obtained by the existing common manufacturing method.

Detailed ways

Please refer to the drawings, a preferred embodiment of the "sole manufacturing method" of the present invention mainly includes the following steps:

A. Take a mold 10 , an insert 20 and a suction device 30 . Wherein, as shown in FIGS. 1 to 3 , the mold 10 includes a first mold base 11 , a second mold base 12 , two plugs 13 , a pipeline 14 , a negative pressure gauge 15 and a control valve 16 . The first mold base 11 has a mold cavity 111 in the shape of the outsole of an air-cushion shoe. There are four supports 112 at the corresponding rear heel of the mold cavity 111. The inner wall of the mold cavity 111 is provided with two accommodating grooves on both sides of the corresponding supports 112. 113 , the first mold base 11 is also provided with a flow channel 114 , and the flow channel 114 communicates with the two receiving grooves 113 and the outside of the first mold base 11 . The second mold base 12 is pivotally connected to one end of the first mold base 11 with one end, and the second mold base 12 has a protrusion 121 in the shape of the inner surface of a shoe sole to extend into the mold cavity 111 of the first mold base 11 . In addition, the plugs 13 are respectively arranged in the two accommodation grooves 113 of the first mold base 11, and each plug 13 has a connecting end 131 protruding from the wall of the mold cavity 111, and the end surface of the connecting end 131 is provided with an annular groove 132, which forms an annular flat portion 133 on the outside of the groove 132, and forms a contact portion 134 on the inside of the groove 132; moreover, each plug 13 has a Y-shaped through hole 135 inside, and two of the through holes 135 The opening is connected to the groove 132 , and the other opening is connected to the flow channel 114 of the first mold base 11 . In addition, the pipeline 14 is a plastic tube in this embodiment, and one end is fixedly connected to the flow channel 114 of the first mold base 11 , and the other end is provided with a joint 17 . The negative pressure gauge 15 and the control valve 16 are located on both sides of the pipeline 14, and the negative pressure gauge 15 can be used to sense the pressure in the pipeline 14, while the control valve 16 can close the pipeline 14, so that the pipeline 14 Sealed inside. Moreover, the insert 20 is an airbag made of elastic material in this embodiment. The air extraction device 30 is composed of four electromagnetic switches 31A, 31B, 31C, 31D, two negative pressure gauges 32A, 32B, two vacuum cylinders 33, 34 of different sizes, a motor 35 and a hose 36, and when the motor 35 starts Afterwards, can carry out suction operation by flexible pipe 36.

B, as shown in Figure 3 and Figure 4, the insert 20 is placed in the mold cavity 111 of the first mold base 11, and the position of the insert 20 is positioned by the supports 112, so that the outer surface of the insert 20 is close to The flat portion 133 of each plug head 13 connects the hose 36 of the air extraction device 30 to the joint 17 of the mold 10 at the same time.

C. Cooperate with Fig. 5, use the air extraction device 30 to vacuumize the through hole 135 of the mold 10, and then extract the air in the flow channel 114 and the second plug 13, and close the control valve 16 of the mold 10 after a few seconds , so that the pipeline 17 is maintained in a negative pressure state, and at the same time, the motor 35 of the air extraction device 30 is stopped, and the hose 36 is separated from the joint 17 to prepare for the next set of molds (not shown here) . At this time, the through hole 135 of the plug head 13 will generate a negative pressure attraction. Since the insert 20 is an elastic body, when its two sides are attracted by the negative pressure attraction, the surface of the insert 20 will expand and attach to the two sides. On the flat portion 133 of the plug head 13 and its abutment portion 134 .

D. Continue to inject the melted plastic material 50 into the mold cavity 111 of the first mold base 11, see FIG. 6, until an appropriate amount of material 50 is poured into the mold cavity 111; wherein, the material 50 is polyurethane resin raw material PU.

E. Referring to FIG. 7 , after the raw material 50 is injected into the mold cavity 111 of the first mold base 11 , the first mold base 11 and the second mold base 12 are closed.

F. After the raw material 50 is solidified and formed, the second mold base 12 is separated from the first mold base 11 , so that a shoe base material 60 can be formed in the mold cavity 111 . A hollow hole 61 is formed on the rear corner and two sides of the base material 60 , so that part of the outer surface of the insert 20 is exposed outside the base material 60 .

As can be seen from the above statement, the present invention utilizes vacuuming to make the outer surface of the insert 20 closely adhere to the flat portion 133 of the second plug head 13, and then when the raw material 50 is injected into the mold cavity 111 and solidified and formed, due to the embedding Because the object 20 and the two plugs 13 are in close contact, the raw material 50 will not flow between the insert 20 and the plug 13, so that after the bottom material 60 of the shoe sole is formed, there will be no burrs or overflow on the edge of the hollow hole 61 Therefore, there is no need for secondary cleaning with chemical solvents, which can maintain the integrity of the appearance of the finished product, reduce labor costs, and reduce occupational injuries caused by inhalation of chemical agents. In addition, the contact portions 134 of the two plug heads 13 can prevent excessive deformation of the insert 20 during the vacuuming operation.

Of course, the present invention mainly utilizes the vacuum pumping method to avoid the occurrence of material overflow when the bottom material of the shoe material is made to form hollow holes, so the insert is not limited to be an air bag. For example, referring to Fig. 9 and body 10 again, it is the manufacturing method of the sole of the second preferred embodiment of the present invention. Fitting inserts 72, and the two inserts 72 are respectively placed in the mold cavity 741 of the mold 74, and each adjacent to a through hole 742, in addition, each of the inserts 72 has an outer surface 721 opposite to the through hole 742 , the outer surface 721 can be printed or embossed to form a three-dimensional pattern or characters; in this way, the finished substrate 76 can see the outer surface 721 of the two inserts 72 through its two hollow holes 761 . In addition, the present invention can of course be used in the manufacture of other shoe substrates, and to meet the design requirements, the mold used in the present invention is not limited to the number of mold bases it consists of, and the mold can also be made of two or two The above mold base is composed.

Claims (7)

1. A manufacturing method of sole, is characterized in that, comprises the following steps: A. Prepare a mold and at least one insert; the mold is provided with a mold cavity in the shape of a shoe sole and at least one through hole, the through hole communicates with the mold cavity and the outside world, and the mold cavity wall has a flat portion on the periphery of the through hole; B, the insert is placed in the mold cavity of the mold, and close to the through hole; C. Vacuumize the through hole of the mold so that the insert fits closely with the tan; D. Pouring or injecting plastic material into the mold cavity of the mould; and E. After the raw material is solidified and shaped, separate the mold from the raw material. 2. According to the manufacturing method of the described sole of claim 1, it is characterized in that, the described insert is an air bag. 3. According to the manufacturing method of the described shoe sole of claim 1, it is characterized in that, the insert is an accessory. 4. according to the manufacture method of the described sole of claim 1, it is characterized in that, described this raw material is polyurethane resin. 5. according to the manufacturing method of the described shoe sole of claim 1, it is characterized in that, in described this step A, this mold comprises a first mold base and a second mold base, and this first mold base has this mold cavity and a stream The flow channel communicates with each of the through holes and the outside world; the second mold base is pivotally arranged on the first mold base, and has a shoe-sole-shaped protrusion extending into the mold cavity. 6. According to the manufacturing method of the shoe sole according to claim 5, it is characterized in that, the first mold base of the mold includes a plurality of supports protruding from the rear heel of the mold cavity; and the insert is placed on the supports superior. 7. According to the manufacturing method of the described shoe sole of claim 1, it is characterized in that, in the said step A, a suction device is further equipped with a hose for connecting the through hole of the mould, and then with the suction Gas equipment vacuumizes the through hole.

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