A method and device for preparing Niuban rain boots

Abstract

The present invention discloses a method and apparatus for manufacturing Niu Blanc rain boots. The method comprises: moving a first last into the mold cavity of an upper molding mold, and injecting and molding rubber to form the upper portion of the Niu Blanc rain boot; placing a Niu Blanc sock over the second last; removing the first last from the mold cavity of the upper molding mold, leaving the upper portion within the mold cavity; moving the second last into the mold cavity of the upper molding mold, and placing the upper portion over the second last; and combining the upper portion, the sole, and the Niu Blanc sock to form a finished shoe; wherein the thickness of the first last is greater than that of the second last. In the present invention, the upper portion is first molded, and then combined with the Niu Blanc sock, eliminating the need for mold clamping during the combination of the upper and Niu Blanc sock. This prevents extrusion at the junction of the upper and Niu Blanc sock due to injection molding clamping. Furthermore, since the upper portion is molded separately, glue leakage onto the Niu Blanc sock is avoided, thereby improving the yield rate.

Description

Technical Field

[0001] The invention relates to the field of rain boots preparation, and in particular to a method and device for preparing Niu Blanc rain boots. Background Art

[0002] In the existing manufacturing process of Niubran rain boots, the rubber injection only has one last and one cavity, that is, the upper part is formed by putting a Niubran sock cover on a last, then moving the last into the mold cavity and injecting rubber to form the upper part. The shortcomings of this method are:

[0003] When the mold is closed and the rubber is injected, the need for injection clamping can cause compression at the junction of the shoe upper and the Nublon sock, which reduces the thickness of the Nublon in this area and creates indentations. This not only affects the appearance but also makes it prone to breakage. Furthermore, this method of production can easily cause glue to leak onto the Nublon sock, reducing the yield rate. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a method for preparing Niu Blanc rain boots to avoid indentations at the junction of the shoe upper and the Niu Blanc sock.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for preparing Niuban rain boots, comprising:

[0007] Moving the first last into the mold cavity of the shoe upper forming mold to form a shoe upper forming space in the mold cavity;

[0008] Injecting rubber into the shoe upper forming space to form the shoe upper of the Niuban rain boots;

[0009] Injecting rubber into the sole molding cavity of the outsole mold to form the sole of the Niuban rain boots;

[0010] Put on the Niu Blanc socks on the second last;

[0011] removing the first last from the mold cavity of the shoe upper forming mold, while the shoe upper portion remains in the mold cavity;

[0012] Moving the second last into the mold cavity of the shoe upper forming mold, and sleeve the shoe upper onto the second last;

[0013] Combining the upper portion, the sole portion and the Niu Blanc sock to obtain a finished shoe;

[0014] Wherein, the thickness of the first shoe last is greater than the thickness of the second shoe last.

[0015] In the present invention, a first last is formed in a mold cavity to obtain an upper portion of a Niu Blanc rain boot, and then the upper portion and a second last covered with a Niu Blanc sock are formed together in the mold cavity to obtain a finished shoe.

[0016] In the present invention, since the first last is larger than the second last, the space of the first last in the mold cavity is only the upper molding space, that is, the thickness of the upper molding space is only the thickness of the upper part. The upper part is obtained by injection molding and locking the upper molding space formed by the first last and the mold cavity.

[0017] Then the first last is removed and the second last is moved into the mold cavity. The upper part obtained after the first last is formed is put on the second last with a smaller thickness to combine the two. Since the upper part has been injection molded, there is no need to perform injection clamping when the upper part is combined with the Niu Blanc sock, which can avoid extrusion at the joint between the upper part and the Niu Blanc sock due to injection clamping. In addition, the upper part is molded separately to avoid glue leakage onto the Niu Blanc sock, thereby improving the yield rate.

[0018] That is, in the present invention, the upper portion is first formed, and then the upper portion is combined with the Niu Blanc sock, so that the upper portion and the Niu Blanc sock do not need to be clamped when combined.

[0019] Among them, the process of combining the upper part, the sole and the Niu Blanc sock to obtain the finished shoe in the present invention is an existing conventional technology, for example, the color separator is pulled out, heated and vulcanized for 200 seconds to 1000 seconds until the rubber is vulcanized and mature, and then the mold is opened and the last is removed, and a finished shoe is completed.

[0020] In addition, the sole of the shoe in the present invention can be formed at the same time as the upper portion is formed, or the upper portion can be formed first and then the sole. There are many specific ways, which will not be described in detail here.

[0021] Preferably, the thickness of the first shoe last is the sum of the thickness of the second shoe last and the thickness of the Niu Blanc sock. In the present invention, when the upper portion formed is combined with the Niu Blanc sock, only the film is vulcanized to form the upper portion and the Niu Blanc sock.

[0022] Preferably, the thickness of the first shoe last is 4 to 10 mm thicker than that of the second shoe last. The thickness of the Niu Blanc socks in the present invention is 4 to 10 mm.

[0023] Preferably, the step of injecting rubber into the upper molding space to mold the upper portion of the Niuban rain boots comprises:

[0024] Injecting rubber into the first last;

[0025] The rubber injected into the first last flows into the shoe upper molding space through the rubber flow channel on the first last to mold the shoe upper of the Niuban rain boots.

[0026] In the present invention, rubber is injected into the upper molding space through the first last, so that no rubber injection hole is formed on the outer surface of the upper during molding. That is, the rubber is injected from the inside to the outside, so that the rubber injection hole is hidden on the inner side of the upper. This not only makes the shoes more beautiful, but also eliminates the need for trimming the rubber injection hole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0027] Preferably, the step of injecting the rubber into the sole forming cavity of the outsole mold to form the sole of the Niuban rain boots comprises:

[0028] Injecting rubber into the color separator between the outsole mold and the upper molding mold;

[0029] The rubber injected into the color separation plate flows into the sole molding cavity through the rubber flow channel of the color separation plate to form the sole of the Niu Blanc rain boots.

[0030] In the present invention, rubber is injected into the sole molding cavity from the color isolation plate, so that the rubber injection hole is hidden in the sole. Therefore, there is no need to trim the rubber injection hole on the sole, which improves preparation efficiency, reduces workload and reduces labor costs.

[0031] The present invention also provides a device for preparing Niuban rain boots, comprising:

[0032] A shoe upper forming mold having a mold cavity for forming the shoe upper portion;

[0033] a first last, adapted to be moved into the mold cavity of the shoe upper forming mold, so that the mold cavity forms a shoe upper forming space;

[0034] The second last is used to put on the Niu Blanc sock cover and then move it into the mold cavity of the shoe upper forming mold to combine the Niu Blanc sock cover with the shoe upper part in the mold cavity;

[0035] Wherein, the thickness of the first shoe last is greater than the thickness of the second shoe last.

[0036] The shoe upper molding mold of the present invention can be of various conventional structures. When manufacturing Niu Blanc rain boots, a first last is moved into the mold cavity of the shoe upper molding mold to form a shoe upper molding space within the mold cavity. Rubber is then injected to mold the shoe upper. The first last is then removed, and a second last, covered with a Niu Blanc sock, is then moved back into the mold cavity of the shoe upper molding mold to allow the Niu Blanc sock to be combined with the shoe upper within the mold cavity. In other words, the present invention allows the shoe upper to be molded first, and then combined with the Niu Blanc sock, eliminating the need for mold clamping during the combination of the shoe upper and the shoe upper.

[0037] Preferably, the thickness of the first shoe last is the sum of the thickness of the second shoe last and the thickness of the Niu Blanc sock cover.

[0038] Preferably, a rubber flow channel is provided in the first last, and the rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the upper molding space.

[0039] In the present invention, a rubber flow channel is provided in the first last. When rubber injection molding is performed, injection molding can be performed through the rubber flow channel in the first last, so that no rubber injection hole is formed on the outer surface of the upper part during molding. That is, the rubber is injected from the inside to the outside, so that the rubber injection hole is hidden to the inner side of the upper part. Not only does it make the shoes more beautiful, but it also eliminates the need to trim the rubber injection hole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0040] Preferably, a temperature control system is provided in the first shoe last. In the present invention, the temperature control system is provided in the first shoe last to maintain a certain temperature in the first shoe last so that the residual rubber cannot be naturally vulcanized.

[0041] The temperature control system in the present invention can have various structural forms. For example, a heating structure (such as an electric heating wire, etc.), a temperature sensor (for monitoring the temperature), and a controller (for controlling and adjusting the temperature of the electric heating structure to meet actual needs) can be set in the first last.

[0042] As an option, it also includes:

[0043] An outsole mold having a sole forming cavity;

[0044] a color separator, located between the outsole mold and the upper forming mold, for separating the sole forming cavity from the mold cavity of the upper forming mold, so that the sole forming cavity and the mold cavity of the upper forming mold respectively form a closed space;

[0045] The color separator is provided with a rubber flow channel, and the rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the sole molding cavity.

[0046] The color separator plate of the present invention forms a closed space with the sole molding cavity and the mold cavity of the upper molding mold, so that the rubber in the two closed spaces will not mix, and the two closed spaces can register different colors and different types of rubber (for example, the rubber of the upper part of the present invention can be Class I rubber, and the rubber of the sole part of the shoe can be Class II rubber. The two rubber types are different. Class II rubber is harder and more wear-resistant than Class I rubber. Therefore, Class II rubber can be used for the sole of the shoe in the present invention). In addition, a rubber flow channel is also provided on the color separator plate of the present invention. When rubber injection molding is performed, rubber can be injected into the sole molding cavity through the rubber flow channel on the color separator plate, so that the rubber injection hole is hidden in the sole. Therefore, there is no need to trim the rubber injection hole on the sole, thereby improving preparation efficiency, reducing workload and reducing labor costs.

[0047] The shoe upper forming mold of the present invention has various structural forms and can adopt various existing structural forms. Preferably, the shoe upper forming mold includes a left mold and a right mold, and the left mold and the right mold respectively have a left cavity and a right cavity. After the left mold and the right mold are closed, the left cavity and the right cavity form the mold cavity.

[0048] The thickness of the first shoe last is 4 to 10 mm greater than the thickness of the second shoe last.

[0049] The rubber flow channel in the present invention can have various structural forms. For example, multiple rubber flow channels can be set to communicate with each other, and multiple rubber outflow holes can be opened on the first last and the color separator to communicate with each rubber flow channel.

[0050] The beneficial effects of the present invention compared with the prior art are:

[0051] (1) In the present invention, two lasts are used to prepare rain boots. Since the first last is larger than the second last, when the upper part is formed in the first cavity by the first last, only the thickness of the upper part is formed. When the upper part is put on the second last with a smaller thickness, since the upper part has been injection molded, there is no need to perform injection clamping when the upper part and the Niu Blanc sock are combined. Therefore, the combination of the Niu Blanc sock and the upper part will not be squeezed, and the combination of the Niu Blanc sock and the upper part will not be thinned due to clamping, thereby improving the yield of rain boots.

[0052] (2) In the present invention, the upper part is separately locked and injected in the first last and mold cavity, which solves the problem of uneven locking at the junction of rubber and Niu Blanc, which will cause rubber leakage and increase the defective rate, and greatly improves the finished product rate.

[0053] (3) In the present invention, a rubber flow channel is also provided on the color partition plate. When performing rubber injection molding, the rubber can be injected into the sole molding cavity through the rubber flow channel on the color partition plate, so that the rubber injection hole is hidden in the sole. Therefore, there is no need to trim the rubber injection hole on the sole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0054] (4) In the present invention, rubber is injected into the upper molding space through the first last, so that no rubber injection hole is formed on the outer surface of the upper during molding. That is, the rubber is injected from the inside to the outside, so that the rubber injection hole is hidden on the inner side of the upper. This not only makes the shoes more beautiful, but also eliminates the need for trimming the rubber injection hole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0055] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 Schematic diagram of the structure of a device for preparing Niu Blanc rain boots in this embodiment.

[0058] Reference numerals:

[0059] 1. First last; 2. Outsole mold; 3. Upper molding mold; 4. Color separator. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0061] This embodiment is a method for preparing Niuban rain boots, comprising:

[0062] Moving the first last 1 into the mold cavity of the shoe upper forming mold 3 to form a shoe upper forming space in the mold cavity;

[0063] Injecting rubber into the shoe upper forming space to form the shoe upper of the Niuban rain boots;

[0064] Injecting rubber into the sole molding cavity of the outsole mold 2 to form the sole of the Niuban rain boots;

[0065] Put on the Niu Blanc socks on the second last;

[0066] The first last 1 is removed from the mold cavity of the shoe upper forming mold 3, and the shoe upper portion remains in the mold cavity;

[0067] Moving the second last into the mold cavity of the upper forming mold 3, and sleeve the upper portion on the second last;

[0068] Combining the upper portion, the sole portion and the Niu Blanc sock to obtain a finished shoe;

[0069] The thickness of the first shoe last 1 is greater than the thickness of the second shoe last.

[0070] In this embodiment, the first last is formed in the mold cavity to obtain the upper part of the Niu Blanc rain boots, and then the upper part and the second last with the Niu Blanc sock cover are molded together in the mold cavity to obtain the finished shoe.

[0071] In this embodiment, since the first last is larger than the second last, the space of the first last 1 in the mold cavity is only the upper molding space, that is, the thickness of the upper molding space is only the thickness of the upper part. The upper part is obtained by injection molding and locking the upper molding space formed by the first last and the mold cavity.

[0072] Then the first last 1 is removed and the second last is moved into the mold cavity. The upper portion obtained after the first last 1 is formed is put on the second last with a smaller thickness to combine the two. Since the upper portion has been injection molded, there is no need to perform injection clamping when the upper portion is combined with the Niu Blanc sock, which can avoid extrusion at the joint between the upper portion and the Niu Blanc sock due to injection clamping. In addition, the upper portion is molded separately to avoid glue leakage onto the Niu Blanc sock, thereby improving the yield rate.

[0073] That is, in this embodiment, the upper portion is first formed, and then the upper portion is combined with the Niu Blanc sock, so that the upper portion and the Niu Blanc sock do not need to be clamped when combined.

[0074] Among them, the process of combining the upper, the sole and the Niu Blanc sock in this embodiment to obtain a finished shoe is an existing conventional technology. For example, the color separator 4 is pulled out, heated and vulcanized for 200 seconds to 1000 seconds until the rubber is vulcanized and mature, and then the mold is opened and the last is removed, and a finished shoe is completed.

[0075] In addition, in this embodiment, the sole of the shoe can be formed at the same time as the upper portion is formed, or the upper portion can be formed first and then the sole of the shoe can be formed. There are many specific ways, which will not be described in detail here.

[0076] In one embodiment, the thickness of the first shoe last 1 is the sum of the thickness of the second shoe last and the thickness of the Niu Blanc sock. In this embodiment, when the molded upper portion is combined with the Niu Blanc sock, only the film is combined and vulcanized to form the upper portion and the Niu Blanc sock.

[0077] In one embodiment, the thickness of the first last 1 is 4 to 10 mm greater than the thickness of the second last. In this embodiment, the thickness of the Niu Blanc socks is 4 to 10 mm.

[0078] In one embodiment, the step of injecting rubber into the upper molding space to mold the upper portion of the Niuban rain boots includes:

[0079] Injecting rubber into the first last 1;

[0080] The rubber injected into the first last 1 flows into the shoe upper molding space through the rubber flow channel on the first last 1 to form the shoe upper of the Niu Blanc rain boots.

[0081] In this embodiment, rubber is injected into the upper molding space through the first last 1, so that no rubber injection hole is formed on the outer surface of the upper during molding. That is, the rubber is injected from the inside to the outside, so that the rubber injection hole is hidden on the inner side of the upper. This not only makes the shoes more beautiful, but also eliminates the need to trim the rubber injection hole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0082] In one embodiment, the step of injecting rubber into the sole forming cavity of the outsole mold 2 to form the sole of the Niuban rain boots includes:

[0083] Injecting rubber into the color separator 4 between the outsole mold 2 and the upper molding mold 3;

[0084] The rubber injected into the color separator 4 flows into the sole molding cavity through the rubber flow channel of the color separator 4 to form the sole of the Niu Blanc rain boots.

[0085] In this embodiment, the rubber is injected into the sole molding cavity from the color isolation plate 4, so that the rubber injection hole is hidden in the sole. Therefore, there is no need to trim the rubber injection hole on the sole, which improves preparation efficiency, reduces workload and reduces labor costs.

[0086] like Figure 1 As shown, this embodiment is a device for preparing Niuban rain boots corresponding to the above-mentioned preparation method, comprising:

[0087] The shoe upper forming mold 3 has a mold cavity for forming the shoe upper;

[0088] The first last 1 is used to move into the mold cavity of the upper forming mold 3 so that the mold cavity forms a shoe upper forming space;

[0089] The second last is used to put on the Niu Blanc socks and then move into the mold cavity of the shoe upper forming mold 3 to combine the Niu Blanc socks with the shoe upper part in the mold cavity;

[0090] The thickness of the first shoe last 1 is greater than the thickness of the second shoe last.

[0091] In this embodiment, the upper molding mold 3 can be of various conventional structures. When manufacturing Niu Blanc rain boots, the first last 1 is moved into the mold cavity of the upper molding mold 3 to form a mold space for the upper. Rubber is then injected to form the upper portion. The first last 1 is then removed, and the second last, after being covered with a Niu Blanc sock, is moved back into the mold cavity of the upper molding mold 3 to allow the Niu Blanc sock to be combined with the upper portion within the mold cavity. In other words, in this embodiment, the upper portion can be formed first, and then combined with the Niu Blanc sock, eliminating the need for mold clamping when combining the upper and Niu Blanc sock.

[0092] In one embodiment, the thickness of the first last 1 is the sum of the thickness of the second last and the thickness of the Niu Blanc sock cover.

[0093] In one embodiment, a rubber flow channel is provided in the first last 1 , and the rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the upper molding space.

[0094] In this embodiment, a rubber flow channel is provided in the first last 1. When performing rubber injection molding, injection molding can be performed through the rubber flow channel in the first last 1, so that no rubber injection hole is formed on the outer surface of the upper during molding. That is, the rubber is injected from the inside to the outside, so that the rubber injection hole is hidden to the inner side of the upper. This not only makes the shoes more beautiful, but also eliminates the need for trimming the rubber injection hole, thereby improving preparation efficiency, reducing workload and lowering labor costs.

[0095] In one embodiment, a temperature control system is provided in the first shoe last 1. In this embodiment, the temperature control system is provided in the first shoe last 1 to maintain a certain temperature in the first shoe last 1 so that the residual rubber cannot be naturally vulcanized.

[0096] The temperature control system in this embodiment can have various structural forms. For example, a heating structure (such as an electric heating wire, etc.), a temperature sensor (for monitoring the temperature), and a controller (for controlling and adjusting the temperature of the electric heating structure to meet actual needs) can be set in the first last 1.

[0097] In one embodiment, it further includes:

[0098] Outsole mold 2, having a sole molding cavity;

[0099] a color separator 4, located between the outsole mold 2 and the upper forming mold 3, for separating the sole forming cavity from the mold cavity of the upper forming mold 3, so that the sole forming cavity and the mold cavity of the upper forming mold 3 form a closed space respectively;

[0100] The color separator 4 is provided with a rubber flow channel, and the rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the sole molding cavity.

[0101] In this embodiment, the color separator 4 forms a closed space with the sole molding cavity and the mold cavity of the upper molding mold 3, so that the rubber in the two closed spaces will not mix, and the two closed spaces can register different colors and different types of rubber (for example, the rubber of the upper part of the present invention can be Class I rubber, and the rubber of the sole can be Class II rubber. The two rubber types are different. Class II rubber is harder and more wear-resistant than Class I rubber. Therefore, Class II rubber can be used for the sole of the present invention). In addition, in this embodiment, a rubber flow channel is also provided on the color separator 4. When performing rubber injection molding, the rubber can be injected into the sole molding cavity through the rubber flow channel on the color separator 4, so that the rubber injection hole is hidden in the sole. Therefore, there is no need to trim the rubber injection hole on the sole, thereby improving preparation efficiency, reducing workload and reducing labor costs.

[0102] In this embodiment, the upper forming mold 3 has various structural forms and can adopt various existing structural forms. In one embodiment, the upper forming mold 3 includes a left mold and a right mold, and the left mold and the right mold respectively have a left cavity and a right cavity. After the left mold and the right mold are molded together, the left cavity and the right cavity form the mold cavity.

[0103] The thickness of the first shoe last 1 is 4 to 10 mm greater than that of the second shoe last.

[0104] In this embodiment, the rubber flow channel can have various structural forms. For example, multiple rubber flow channels can be set to communicate with each other, and multiple rubber outflow holes can be opened on the first last 1 and the color isolation plate 4 to communicate with each rubber flow channel.

[0105] From the above, it can be seen that the manufacturing process of the Niu Bolang rain boots in this embodiment can be as follows:

[0106] (1) Open the mold, open the left mold, the right mold and the large bottom mold 2;

[0107] (2) moving the first last 1 into the mold cavity;

[0108] (3) The left mold and the right mold are moved to close; a closed space is formed between the left mold, the right mold and the first last 1, which is the molding space for the upper and the shoe shaft (i.e., the upper molding space);

[0109] (4) A rubber flow channel is preset in the middle of the first last 1, and a type of rubber is injected from the injection hole of the first last 1 and ejected from a number of small holes at the other end until the upper molding space is filled, thereby forming the upper portion and the shaft portion (i.e., the upper portion) of the rain boot;

[0110] (5) Move the color separator 4 and the outsole mold 2 to above the left mold and the right mold; a closed space is formed between the color separator 4 and the outsole mold 2, which is the molding space for the sole (sole molding cavity);

[0111] (6) A rubber flow channel is preset in the middle of the color separator 4, and the second type of rubber is injected from the injection hole of the color separator 4 and ejected from a number of small holes until the sole molding cavity is filled, thereby forming the sole of the rain boot;

[0112] (7) The first last 1 is provided with a temperature control system to prevent the residual rubber in the first last 1 from naturally vulcanizing;

[0113] (8) Remove the color separator 4, and the sole of the rain boot remains in the sole molding cavity;

[0114] (9) Open the left mold and the right mold, remove the first last 1 from the mold cavity, and leave the upper part and the shaft part of the rain boot in the mold cavity;

[0115] (10) Put on the Niu Blanc socks on the second last;

[0116] (11) moving the second last into the mold cavity;

[0117] (12) Close the mold to make the left mold, right mold, outsole mold 2 and second last completely fit together, then continue heating and vulcanizing for 200 seconds to 1000 seconds until the rubber is vulcanized and mature, then open the mold;

[0118] (13) Take off the last and a finished shoe is completed.

[0119] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A method for preparing Niuban rain boots, characterized in that: include: Moving the first last into the mold cavity of the shoe upper forming mold to form a shoe upper forming space in the mold cavity; Injecting rubber into the shoe upper forming space to form the shoe upper of the Niuban rain boots; Injecting rubber into the sole molding cavity of the outsole mold to form the sole of the Niuban rain boots; Put on the Niu Blanc socks on the second last; removing the first last from the mold cavity of the shoe upper forming mold, while the shoe upper portion remains in the mold cavity; Moving the second last into the mold cavity of the shoe upper forming mold, and sleeve the shoe upper onto the second last; Combining the upper portion, the sole portion and the Niu Blanc sock to obtain a finished shoe; Wherein, the thickness of the first shoe last is greater than the thickness of the second shoe last.

2. The method for preparing Niu Bolang rain boots according to claim 1, characterized in that: The thickness of the first shoe last is the sum of the thickness of the second shoe last and the thickness of the Niu Blanc sock cover.

3. The method for preparing Niu Bolang rain boots according to claim 1, characterized in that: The thickness of the first shoe last is 4 to 10 mm greater than the thickness of the second shoe last.

4. The method for preparing Niuban rain boots according to any one of claims 1 to 3, characterized in that: The method of injecting rubber into the shoe upper forming space to form the shoe upper of the Niuban rain boots comprises: Injecting rubber into the first last; The rubber injected into the first last flows into the shoe upper molding space through the rubber flow channel on the first last to mold the shoe upper of the Niuban rain boots.

5. The method for preparing Niu Bolang rain boots according to claim 4, characterized in that: The method of injecting the rubber into the sole forming cavity of the outsole mold to form the sole of the Niuban rain boots comprises: Injecting rubber into the color separator between the outsole mold and the upper molding mold; The rubber injected into the color separation plate flows into the sole molding cavity through the rubber flow channel of the color separation plate to form the sole of the Niu Blanc rain boots.

6. A device for making Niuban rain boots, characterized in that: include: A shoe upper forming mold having a mold cavity for forming the shoe upper portion; a first last, adapted to be moved into the mold cavity of the shoe upper forming mold, so that the mold cavity forms a shoe upper forming space; The second last is used to put on the Niu Blanc sock cover and then move it into the mold cavity of the shoe upper forming mold to combine the Niu Blanc sock cover with the shoe upper part in the mold cavity; Wherein, the thickness of the first shoe last is greater than the thickness of the second shoe last.

7. The device for making Niuban rain boots according to claim 6, characterized in that: The thickness of the first shoe last is the sum of the thickness of the second shoe last and the thickness of the Niu Blanc sock cover.

8. The device for making Niuban rain boots according to claim 6, characterized in that: A rubber flow channel is provided in the first last. The rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the upper molding space.

9. The device for making Niuban rain boots according to any one of claims 6 to 7, characterized in that: Also includes: An outsole mold having a sole forming cavity; a color separator, located between the outsole mold and the upper molding mold, for separating the sole molding cavity from the mold cavity of the upper molding mold, so that the sole molding cavity and the mold cavity of the upper molding mold respectively form a closed space; The color separator is provided with a rubber flow channel, and the rubber flow channel has a rubber flow channel inlet connected to a rubber injection device and a rubber flow channel outlet for injecting the rubber in the rubber flow channel into the sole molding cavity.

10. The device for making Niuban rain boots according to claim 9, characterized in that: A temperature control system is provided in the first last; The shoe upper forming mold comprises a left mold and a right mold, wherein the left mold and the right mold respectively have a left cavity and a right cavity, and after the left mold and the right mold are closed, the left cavity and the right cavity form the mold cavity; The thickness of the first shoe last is 4 to 10 mm greater than the thickness of the second shoe last.

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